Hughes main stud girdle - yes or no

I bought the Hughes girdle kit but having presented it, along with my block, to my engine builder he is quite reluctant to use it.
To give a bit of background, he has measured the mains fitted with the supplied Hughes / ARP studs and tells me no line hone is needed
(I thought one had to hone when switching from bolts to studs, but he implies not, is it simply a case that if bore is concentric then all’s ok?).

Anyway, he showed me the girdle plate laid in place, no fasteners, and it can be wiggled around a fair bit, i.e. the stud holes are in no way an interference fit with the studs themsleves, he also was concerned about the use of shims between the main stud nut and the girdle plate as he thought this might allow the cap to flex but not be able to return to its original position causing more stress (He lost me a bit here, but that was the gist of it I think....).

What do you guys think? I feel a bit reluctant NOT to use it as it was 500 bucks, but this builder has a proven record of building top notch drag and historic racing V8 engines and I’m sure he knows what he’s talking about!