quick question for my front and rear tires /foams. i have the ftb4.1 wc with the losi spring set up, i run on a small dirt indoor track,aka and jc supersoft tires are tires of choice there .have a set of front jc ss barcodes, should i run stock inserts or set of jc closed cell inserts reason for asking is i have an extra set of inserts for my old buggy i never used ?