I don't think that would be a good idea. The solution would be very thick and crash hard once inside your muscle. The ester is very lipophilic and your muscles are very aqueous. The solvent is what retains it at the depo site. I have always had a bad time with 1-T cyp, but this last batch from 1fast hasn't hurt yet. I started using 37.5% BB so that might have something to do with the improvement, also I've been mixing it 1:1:1 with 4AD cyp and 19Nor cyp and haven't had one bad injection so far. If you really wanted to push the concentration that high, 50% BB, 20% BA plus a co-solvent like phenoxyethanol might work. I think the pain and knotting would be bad though. Also, it's thick, but you may want to experiment with castor oil as your oil base with super high concentration stuff. It's suppose to have exceptional retaining ability.