UPDATE:
I done mine today!!
I found out the rear offside seals had been previously botched with silicone and I couldn't get one of the front passenger T20s out (that side is bone dry anyway but will drill it out next time car is on a ramp)
All in all pretty simple but I WOULD recommend a heat gun to
help get rid of the rotten seals and I had IPA to clean the metal too.
Another thing I haven't seen mentioned is the circular rubber speaker boots that no matter what I couldn't get back on the Blaupunkts.
I only broke 2 door clips and everything seems to be snugly back in place and working.
PS I washed the car and ZERO water was getting in where it had been previously seen.
I'll just need to keep sooking the residue way with my George Wet Vac but it wasn't that wet inside anyway.