85 spins is the progression that I use for the Bullseye method. It is based on a 500 unit stop loss which was then optimized from 31 spins to 85. The originator of this class of systems recommended a 53 step progression 1,1,1,2,2,2, etc. but I got significantly better results with the 8 interval 1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2, etc.
I am keeping my eye on Tending The Flowers but I suspect it is too aggressive and needs some kind of modification that I haven't figured out yet. I think there is also the problem that it is fully based on reverse engineering the bet selections which has its own inherent problems? The upside potential is so incredibly high but the downside is too significant a possibility?
I definitely flow around quite a bit in roulette and I find it is an excellent way to learn on a subconscious level. : D