I have the same combo and have no problems. I'm running 5% OMega (pink stuff) with xoar 17x6. The tank on that plane, placement wise should not be an issue, so in your case, doubtful it is starving for fuel. the stumbling on spool up is probably your low speed being set too rich. A 1/4 turn was most likely too much. Try leaning out 1/8 turn. The other way to test low speed is to let the plane idle for a minute or so, then go full throttle quickly. Any stumbling on the transition would indicate too rich a setting for the lowspeed. i don't think the perry is necessary on this plane, but just my opinion.