Know what you mean AT...you have the 2.25" I'd work with that after the trouble of finding a 1". There are elements (1") out there (USA, China) that will do the job, just a bugger having to wait until the first week of March for it, although I've had an email today saying it's on it's way .
The more I think about using a 3"x 2" reducer with an end cap the better I like it...maybe something to get my head around later on this year. All I want to do is get this new kit up and running...I've 46 liters to do...looks like I'll have to use the 500..
The next box of bits from SDe are now on UK soil so early next week I'll have them, won't be able to do anything..other than polish them..

That 6" triclamp flange will be a big bugger...don't forget the photos.