I've been testing the damaged TD88 dish and the replacement and to be honest there isn't really any noticeable difference using just my DrHD F15 satellite receiver's meter. Maybe the damaged one is down by 0.2dB or so, but equally it could be thicker clouds passing (unfortunately it's cloudy now for the foreseeable future) or my inaccuracies in getting the dish in the same position (I just replaced the dish face and left the mount on but had to remove the LNB first). Either way, it's not a dramatic difference.
What is dramatic the the difference between the TD88 (active surface about 85cm) and the old clear plastic mesh dish (active surface about 79cm) I'm replacing. For the first time I'm picking up some lower Astra 2E Europe transponders (nice to have the full EPG again) and also most of the Astra 2A southern transponders. I'm now seeing the Eutelsat 28A horizontal transponders for the first time too (I should have done this years ago!!).
I always suspected something was up with my clear dish and the horizontal transponders where always a lot weaker then the verticals but I assumed it was the dish position on the balcony or the LNB.
So a good result, very happy with the TD88 even if it is a pain to align. Luckily I'm working at floor level on my balcony so can take as much time as needed to get it spot on, even if it involves a few swear words...
Sadly I've reached the physical limits of my balcony, I can't go any bigger I won't be able to open the door, but the extra 6cm is good.