TRIumphant wrote:And it's best not to mix SRAM and Shimano together.
SRAM have 1:1 actuation which I think they call "exact actuation" these days. IMO it provides a more positive, crisp shifting experience certainly with my MTB SRAM groupset. I think Shimano used to be and may still be 1:2 actuation so if you mix components then the shifting accuracy isn't as good and might be one or two geras you can't hit. I wouldn't mix shimano shifters with SRAM derailleurs or vice versa for that reason.
I thought I'd seen a converter from campag to shimano cassettes... searching Google seems that the conversion only really works from shimano freehub to accept campag cassette. However, come up with this but for the price you may as well get wheel rebuilt fully with a new hub that has a shimano freehub!!!
https://clemenzo.com/index.php/component/page,shop.product_details/flypage,shop.flypage/product_id,83/category_id,34/manufacturer_id,0/option,com_virtuemart/Itemid,36/lang,en/You may be able to have the freehub changed only, but depends on the manufacturer of your hub - maybe ask Bridgetown if its possible for your wheel without any major work - in most cases it just requires the right sized spacers.