I believe it is the 16" Qk although I have never taken it off so not sure just how quick it really is. And yes, it took them a few weeks each time to get the part as no one stocks it. Luckily they were both in the first year of warranty, but now I'm worried it could happen again and be a big out of pocket setback.
What do you use both the 4710 and 110 for?