I love YaBB 1G - SP1!
I did a coin run of 5-2 and I must say it is a fun level to run. If you triple jump you can get into the first pipe at 489. The rest of the level is pretty much just go as fast as you can with a short detour for the second coin and a quick jump for the 3rd. I got a time of 434 just barely missing 435. Also I think 5-2 is a faster level than 5-3 for a low % run by a longshot. If the vines force you to go to 5-3 then it is reset time...