Well, IMHO, inflating implant (or not inflating) for use with a VED is dealer's choice.
Either way, you will get the blood flowing. why wouldn't you?
I have had a semi and now have a 3-piece.
For the semi, I was using a VED 3 weeks prior to surgery to getting 3 piece. IMHO, it helps with those mysterious pains. For the semi, you don't get to pump, everything is right there! Just lift up, insert.
For the 3 piece, I just had surgery in March (and Dr's Telehealth appt the AM today), things are still too painful for insertion into sleeve (and I am uncut). The pumping stretches the inside of my dick, and pumping is painful when I really stretch things. Inserting dick into sleeve of VED was not going to work, so I took out sleeve and have inserted and used the VED successfully. FYI, Dr. told me that the force needed for penetration on sleeve vs. (actual) vagina is 12 lbs vs. 3 lbs. I mentioned oral was painful, and all he said was I was still healing.
Niarceel posted some links in
ucp.php?i=pm&f=-1&p=50892 (Penis Enlargement Post-IPP Surgery) that I think are helpful