athenspin was kind enough to send me some really nice photos of the TMNT ramp...Thank you very much. I have been lobbied a lot to do the ramp for Time Machine. The reason I haven't even tried yet is due to some very thin walls between 2 lanes on that ramp... Although not quite as bad, they are very similar to the walls between the lanes on the TMNT ramp. Both the Time Machine ramp and TMNT ramp are what is referred to as a female form...In other words, the mold looks pretty much like the actual ramp and the plastic is pulled down into it as opposed to a male mold where the plastic is pulled down over an inverted form of the ramp. So imagine the mold with fairly thin walls separating the lanes. The material I currently use for my molds is a ceramic. It would be difficult to cast the mold with thin walls like that (Even thinner and more curve on Time Machine) and not have them break when I tried to remove the original from the cast ceramic. Let's say that I did get a good cast. While the forming process itself generally won't damage a mold, I suspect that those walls in the form would certainly bust when trying to remove the plastic from the mold after forming. The mold for Time Machine would not withstand one pull. TMNT is not quite as bad, but I do not think I would even attempt it with a ceramic.
This was not a problem with the original manufacturing of this ramp as the original mold was no doubt made of solid aluminum. Given the relatively low volume production runs these days, it simply makes no economic sense to spend several thousand $$$ to have a mold made out aluminum. Starship Fantasy still uses the original molds for most of his ramps.
Doesn't mean it can't be done. If someone wants to "beat me (Freeplay) to the punch" as lordloss stated, I would strongly recommend you try to beat me to the punch on something other than the TMNT ramp....you will fail a lot before you figure out a way to do it....I expect a good deal of failure as well. Recall the difficultly I had reproducing the ramps for Genesis...I threw away somewhere near 100 tests forms before I figured out the best way to make them.
So can it be done? I am looking at another medium to make molds with...actually an aluminum impregnated epoxy. This might be strong enough for molds like the TMNT and possibly for Time Machine, but will it be smooth enough and can it be machined after cast for corrections. It's quite expensive so errors can get costly quick, but certainly a whole lot cheaper than having a mold cut from an aluminum Block! As far as Time Machine is concerned, I would certainly be more inclined to test a new mold medium on TMNT first.
Oh yeah...and I need the bigger heater. Added a photo below so you can see what I'm talking about with respect to the thin walls.