When I was sending my ZD for the new Z4 update, I hemmed and hawed about how many pads I wanted to add, and if I wanted the wireless mode put in.
Well, IMHO I did make the RIGHT decisions (for a change!).....
~ I added all the pads I could (6 more) thinking that if I didn't need them, I just wouldn't use them... much... not! I wish I could have added 6 more! Though using Zenedit (and getting it finally all sorted) has lessened the desire for more pads since I can now do crossfades exactly as I want them. But I am very glad I added the 6 that I did.
~ I had the wireless Midi Pro installed with the internal battery box. Not only was it professionally done (in appearance and workmanship), it is one of the best options ever. I am now unofficially the 'sound check guy' for the band. I stand out front during one of the first several songs and make sure our sound is spot on. This in itself has been terrific. But also I am not tied to one spot on stage, and don't have to worry about tangling my cords up. The rechargable battery setup suggested by the Inspector is initially expensive, but I have never had a freshly installed battery quit on me during the entire night, and I leave the zendrum on during breaks. I always recharge a battery before a gig and keep a spare with me, fully charged; but I've never needed the spare (so far!). I also keep the 'wired' connection with me just in case, but no need as of yet.