Thanks Jammin.....Hey frank L, my tuned GRP .21 is flat on bottom as well. If I put silver springs on new long wear losi shoes, in your opinion how many gallons (if that) would I get on the shoes? Right now Im running the green and gold springs on long wear losi shoes with about 3 or so gallons and to me they dont look very worn at all. I have'nt had to clean them up at all.