901 and 510. Currently using a SLB LR 901 atty on a DSE-905 V3. I'm liking the lr 901 atty, I was using one on my ego for a while. For the 510 I usually have on the ego, I seem to prefer the Joye LR atty better than the others I've tried.
Also i find if i lay down the 901, the 901 seems less inclined to leak. IDK still spending time with the 901.