You only need to stabilize down to the lowest point your wine would see in your "cellar" each Winter. You don't have to take it down to 30 unless your trying to maximize the tartrate formation. I have wines from fresh grapes that are 5 years old now that have little to no crystals as I waited 2 Winters before bottling and the temps are stable in the Winter in my cellar.
Okay, tested my wines. Merlot blend pH 3.66 TA 5.9 g/L. Dornfelder pH 3.78 TA 5.8 g/L.
So what kind of a pH jump are we talking here if I cold stabilize these? 3.78 is getting up there.