Thank you for this, and I though I would also share my experiences... I have now used PP 18x20 for several weeks in singles and doubles, after using TT100P (2015) for several years now after many many years from competitive college tennis.
TT100P was giving me some wrist/arm ache recently also that I recently suffered from TE (but from traveling and carrying heavy carry-ons) and I also wanted something with more control, especially that I am now playing more doubles... so that's the reason I was very excited about PP18x20. I also tried the 16x18 but it was too spiny for my game and not enough stable, despite being lots of fun. I switched the grip on my TT100p to shock grip and added some lead at 10&2 for stability/plow and now they come to around similar specs to PP18x20 - 340g weight and around 330 SW, I also have some tape on PP100. This made TT100P less maneuverable than before but more stable and comfortable.
When I play singles, I find PP18x20 very good in many areas, control/stability/forgiving/comfort/groundstrokes/slices and not that less powerful than TT100p, and it sounds great. I feel more confident not to overshoot balls but still get penetrating top-spin shots. Slices are great. The only time I really miss or come back to TT100P is on serves really, especially for first flat serves, but again I have gut/poly on my TT100P and only syngut on my PP18x20.
Surprisingly, I didn't find PP18x20 very suited to doubles, great drop-shots but my volleys were not precise, and landed in the net when weaker shots came in, and serves not very strong enough. In a recent game, when I switched to TT100p in a doubles match, I played much better and did less unforced mistakes, but still sometimes overshot due to less control too much power.
I actually ordered the 93p for doubles now, having heard so much about it, it is not a light racquet and I will should work on my strength/arm more to handle this. I will still keep the PP18x20 for comfortable/leasure singles plays and for doubles for a more forgiving 93p.
Look forward to your experience on doubles too.. its probably just me than the racquet
Thx