I don't know about the one Speedwaymotors has...awfully expensive for what strikes me as an odd design. And as I said I'm not certain about the one you mentioned on eBay, either. I took another look at it. Could be a knock-off and it could be something else entirely.
Given the amount of spark that ugly blue one I modified puts out, I'm inclined to use it for a while and see how it does. I'll make an offer to one of the sellers of the red one and see if he takes it.
