Hi,
I keep my Bav 36 on a swinging mooring and the boat is only provided with a single bow roller lead. Before mooring I just lift my anchor out and stow it on deck port side, with a lashing to ensure it remains secure. When I leave the mooring the anchor is returned to its usual place. Yes, it's a bit of pain to have to do it every time, but the boat won't fall apart just because it doesn't have two roller leads. The mooring has a soft rope between the riser chain and where it gets secured on deck, so it's important that nothing remains even remotely near enough that it might result in the rope getting chafed, so having a second roller lead probably would not do away with the need to move the anchor out of the way. One thing however is that the existing roller lead was a bit flimsy and was quite significantly bent following the strains imposed on it during the first year (2012). Since then I've had it beefed up with some 8mm stainless steel added to the base and some ribs added to stiffen the vertical sides, and it survived 2013 without problems.