Thanks everyone for their comments here. I pitched this question to Dan, but thought i'd check around a little further in the mean time. So my ebay seller sent me a left caliper on accident... The correct right side is not available. Would it be of any consequence to mount the brake on the left for this project?
What think I have going for me is:
- Dan's adapter plate can be used on either side
- 34mm forks in this case have the caliper mounts high enough on the leg to clear any speedometer mech or cable.
Dont see any reason why I cant do this: