why not do it to your ss440? there motors are realy strong and there gearing is great for a 136 x 1.5 track, it takes a bit of modification and you need a TXL 340 thats been extended with that track on it but there bamf sleds ill get some pics of my friends he only has a 136x1x15 track on his though
im not here to make friends, hate me all you want im not leaving.