Have a look at Porters and Hardings Glorius Twelve bunch there are a few very nice gunclub.Here is one I made up a few years ago London Lounge always have the best gunclub IMHO in terms of scale, colour and patterns. I am awaiting this one. It may be still available. Mr Alden wearing it very nicely.https://www.flickr.com/photos/thelondonlounge/11187442394/Also from Delfino the Italian designs are more vibrant.
The armhole gets widen at at the bottom just a small area of the armscye, the sleeve doesn't have to come off the jacket, it's only open up slightly and reattach, shoulders and other area are not touch, bringing it to a competent tailor is the key. You jacket will be much more comfortable after this alteration.
If arm holes are too high it will dig into your armpit making it uncomfortable and the jacket won't sit probably on your shoulders. A simple test is too feel how close is your armpit to the bottom of the arm hole. You can have the arm holes widen by a competent tailor that will alleviate the problem, I've had this work done before it's not a major alteration.
Thanks!Thanks! My one and only jacket with those details. My taste is a lot more sedate these days. This jacket was commissioned from John Cutler Bespoke close to 9 years ago as you can see his style is very English. My taste has changed a lot since then but I do enjoyed wearing this jacket from time to time.