Still waiting for the package, should be here by next week. I'll see if I can get some clips then. The last time I had JJs (ECC83S) they were a bit too flubby sounding for my taste, but since the amp seems to be more on the bright/tight side it could suit it well. The power tubes haven't been swapped by the previous owner but I'm looking for a pair of EL-84s atm. I wonder if I could get some more lowend out of the amp with different power tubes or if i should just go and get the depth mod done. I'll probably get some NOS ones from Tube-Town.