I saw what Edd did with his rig except for the alteration of the chest strap, which I assume he raised it up higher on to the shoulder straps?
I didn't like the way he did the bungees attached to straps coming from the back, if this is the way he still has them, inflate the wing and the straps limit air movement to the exhaust valve on top and get tighter, doesn't make sense to me. Talking to Edd he doesn't agree but I had the straps running from the back and it did limit or slow down dumping from the top exhaust.
Both my buddy and I dove our Hollis's for the week we were down and neither one of us had any problem dumping air from the exhaust on top with inflater on the bottom while in any position, we didn't try it head down, feet up...In trim it was no problem, not even remotely a problem, wasn't even something we discussed when it came to problems with the rig. Dumping the wing fully can be done and done easily on our rigs.
I saw where he put the door handles and where he added another set, unless he changed this since but I found it unnecessary and so did my buddy...Neither one of us has any issues on where they are or adding stages to the ones there. Have absolutely no issues reaching the handles, found it quite easy.
My rig and his has needed no industrial sewing, found no need to make the shoulder straps go straight down, have no problem adding backup lights to the way they are and stability the way they are angled is a non issue.
Guess everything is based on what you are use to, like you, I have dove both but prefer the Hollis by far. I hated the nomad when I dove it....but in defense of the nomad it wasnt adjusted to my liking, it wasn't mine to modify to my liking and the wing couldn't be modified to my liking even if I was allowed to. In my opinion its not a good design....I dont like the design of any of the dive rite wings or some of halcyons. I like longer, narrow wings that lay mostly flat when inflated, dont taco. My backmount wing is a Oxycheq.
Its easier to get a rig to the way you like it when you own it and I would never buy a nomad over a Hollis cause mine works the way I want it to. Which like I said I wouldnt be able to do with a nomad unless I changed the wing out, its terrible IMHO.