Salutations, In retrospective i realize i wasn't ready to launch a dedicated thread for my "Plan-A" concept (based on Induction Heat) years ago, while i still faced serious trouble just trying to adjust my "Plan-B" - where "B" stands for butane... First things 1st, back then i could vaguely sense the VG Classic pipe might prove convenient as a "Prototyping Platform" so i thought i'd simply need to work for some time on "defocussing", to prevent/delay premature formation of a hot-spot preceeding combustion... M'well, initial efforts involved the inclusion of an air layer within my Sphere's core, like this: Which was later revised to evaluate a mix of air/metal and even glass: Then a screen-wrapped secondary SiC "puck", to promote more even distribution of intense heat above the bowl: ... But i was still failing to notice VaporGenie's patent (US 7434584 B2) actually mentions a metal disc (fig. 11), so as seen from my own perspective it felt quite exciting when i found in a local store what i later designated as the "Unidentified Filter Object" Element (see middle component in middle box): But although real significant progress had been made such changes remained localized to the main core cavity only, while a last revelation awaited beyond... Many seasons had passed in the meantime. My enthousiasm over flexible PVC Tubing Extensions never vanished as it always felt convenient having direct line-of-sight, ideally combined to a #55 size "PinHole" (à la VapMan style): Too bad hardened PVC will end up cracking from mechanical stress, most especially in "J" shaped articulated version, which is certainly a must-have DeLuxe option anyway! Not to mention the PinHole as i was counting on this to help develop some finer ritual(s)... Then, besides torch flames often going extinct in long ordinary funnels, safety for my finger's skin became a major concern too... Though not anymore since i successfully implemented recessed metal-ring scenarios, finally! It was also the right move to continue testing sandwich structures inside hybridized cores, with the UFO Element in it, as that proved to renew my motivation a great deal doing so: And my imagination too i must confess!... Well, at least so it seemed, until i decided to flatten this newly-found UFO shape into a disc, as follows: Then being limited to VG's main cavity, inside its metal monobloc, the thought occured to me perhaps that was exactly where i happened to be overlooking all along: And it turns out the final solution was to take my core closer to its target by adopting an equally hybrid cavity which extended to the Screwing-Base aperture (hence VG's monobloc became too long)... The thing is i only installed 1 SiC Puck using a Sphere's top opening; alternately, my Brass-Screen wrapped Top-of-Bowl SiC Puck and associated 17-Holes Metal Disc were juxtaposed to it proceeding from the other side. By the way, after numerous configurations it became desirable to simplify written notes using my own personal notation, for example: As strange as it may sound millimeters & fractions felt appropriate (!); that way i could keep track quick just by refering to previous posts with a few numbers on them. In such given case its Front Puck was 3.25 mm thick, its Metal Disc was 1.25 mm thick and its Top-of-Bowl Puck was 2.75 mm thick. All of that could fit inside a genuine-look easy-to-reconfigure VG Sphere, knowing the full treat actually depends on a level of customization translating as a cut of the hard metal monobloc itself, nonetheless. ... Lets say it was no trivial task and yet i must recommend it with very little hesitation: Especially once the reader has been informed what tools worked best... Only then could i expect my dreamed-of ellusive "sweet-spot" zone to reveal itself, sometime, somehow (...): Eventually... Lucky me a couple patterns emerged that proved sufficiently inclusive: YMMV. A favourite layout will be determinded by a guy's targetted "range-of-application", meaning the broader aim leads to more trade-offs and often with paradoxal effects from the human part of this equation (learning curve accounted for). A conservative spotless one-size-fits-them-all setup would range around "4¾ - 1¼ - 3¼" while i'd find "4¼ - 1¾ - 2¼" more appropriate for Micro-Bursting and/or further "Calumet" experiments using weaker flames, etc. As a matter of fact i believe the VaporGenie company should offer their Classic/Bronze pipe with multiple Spheres, e.g. full-length + trainer + full-custom in order to accelerate acquisition of operator skills - and who knows, ultimately, perhaps even an IH-compatible Sphere designed with butane-free/optional-butane alternate-power scenarios in mind... Now imagine being able to inject brief "packetized" bursts of heat directly into such a core, wirelessly!... Oh and of course it already got a fantasy-name of my own: "Lava", where "A" stands for "Plan-A", in a Bi-Energy VG scenario!... Good day, have fun!!