There is no single "Original" Hercules, it was made in many different styles, and evolved over the years.
The mistake that I think some manufacturers make is that they build off of a single "original" jacket, and that becomes their absolute.
The way BK shrugs off customer concerns is very strange. To me the customer support was great and patient. However, from what I'm reading I'm lucky.
I am only aware of one company that deems its repros absolutely correct, and all others incorrect.
"We're not bashing the competition just making clear that you will not find this leather elsewhere."
We especially developed these leathers to satisfy our customers, give them great quality, the closest to the real thing, something new that no one else can provide. That's not bashing, it's called winning over the competition.
"Just to clarify some more for those who still don't understand. The fact that our newest Liberty horsehide is 100% accurate to vintage horsehide does not mean that our previous horsehide/products were not good enough. They were just about the same good quality or better with what you can find from every other major league manufacturer in the market. Like we said above the new Liberty horsehide is for the purist, high end, hardcore vintage leather jacket fan."
zhz, did you ask BK to shorten the sleeves? Reason I ask is when asked to shorten the sleeves some makers would just cut them short in stead of revising the whole sleeves and the sleeves would not taper as much hence the extra wide cuffs.
Same as you, I have thin arm as well, and this might a reason it looks wide on me, and shorten the sleeve might be another one.
And the thing is I know this could happen, but I forgot to ask BK to narrow the sleeve.
To be fair, this shortening without revising and tapering the sleeves happens to quite a few of the makers. Lost Worlds Ryder my personal experience (it was a made for Japan model), Aero 30s half belt (my friend sent it back for further alteration), Alexander Leather (another friend of mine took it to a local tailor for alteration).
I think the issue stems from the fact you did the HWT on the sleeves. The flat cuff pic shows a normal sleeve taper and no creases. In the later pic with the sleeve creases the cuffs are still looking like they are at the original/normal size. There is no way you can shrink a stitched seam with folds at the same rate. I would only contemplate the HWT on a sleeve where the full length may react.