MOPED ARMY

i have a Tomos A3 with a bi-turbo and a stock jug that I port matched, and i have also had it re-bored to the first over size piston, and i had the head and the cylinder "faces"(where they touch) shaved off to get them smooth. so i bought a new 14.12 sha and made a bracket to get it out from the under the frame. and connected it with copper elbows and clear pvc tubing. so..

i am wondering if i shouldn't get a 15.15 to accommodate all of the performance mods.