Good catch on the "central vision" stock, Geoff. That's the fly in the ointment with the Evans, even if one doesn't mind putting up with the foibles of a British game gun. (I don't, and I own a pair of Brit 12's with 28" barrels that are in the same weight class as an RBL 20. Why look for a smaller gauge if not for weight reduction?)
John, "never" is too definite a word to use in the case of off the rack guns, of any kind, not fitting. I'm pretty average when it comes to dimensions, and my Brit pair fit me as well, without modification, as about anything I've ever owned. For most modern shooters, a classic Brit double is much more likely to fit, or come close, than a classic American double--unless the American double is a pretty late one. Usually, American doubles came with a lot more drop than Brit doubles. And European walnut tends to be easier to bend, if that's necessary, than American walnut. But when you're shopping used, you certainly need to factor in what you need to do to the gun (stock modifications, any necessary repairs, opening chokes, etc) and add that to the price. The only modification mine required was "choke surgery"--and that on only one barrel out of 4. There have been a few repairs, fairly minor, but that's typical of vintage used guns. I always advise people shopping for doublegun bargains to look newer used, like post-WWII. Something like an SKB or Miroku Daly, Beretta, Bernardelli, Sauer, etc. Fewer miles on the odometer, modern proofs and chamber lengths, often significant savings off what a similar gun would cost new today. Try to find something the quality of an Ithaca SKB 100 for the $7-900 or so you're likely to pay, price depending on gauge and condition. Or the Beretta GR-2 I just bought, for about the same money.
