First time out with tranzbrake ??

OK the time is nearing for my first attempts with a transbrake.I,ve upgraded most everything that could break so far..
Dana60 with 4.30 spool
CalTracs
Chromemoly driveshaft..1350 u-joints,billet yoke
7AL 2step Plus

My converter is an 8 inch Coan 4500 stall.My question is "Whats a good RPM"to start my launches at?I,m thinking I,ll start at 3500 and work my way up to 4500.I,ve got the butterfly feelings again with wondering how the car will react.(Going straight,pulling left or right,Too much wheelie,which I don,t want)

So,what have others started there RPM at when first trying their tranzbrakes?