I suspect you will be pleasantly surprised by the good fit of your new eXp R, although you may have to fine tune the saddle fore and aft position and height without an old bike to take those measurements from. You will be covered by the 100 days warranty in case you really cannot live with the new bike. It is worth asking how long it will take to make after ordering, you may be looking at 3 months or longer in the busy spring season.
In my case I live too far from Bridgwater for a casual visit.
I discussed, ordered and specced my Thorn eXp using mostly phone calls and a couple of e-mails. I did have an old bike to take measurements from and this was used as part of the order process.
The bike when it arrived fitted me perfectly, although I didn't appreciate this until I tried adjusting the odd thing.
Any adjustments I made I ended up putting back to the original positions as being the best.
Over all a very high customer satisfaction rating.