Funny you should say that. My first thought was to make a fill-in fender shaped piece that could be stored somehow on the underside of the main tail piece, out of sight, but then if the weather took a turn for the worst, I could unclip it and then clip it as a sort of 'bridge' between the small hugger and the fender piece right at the back of the bike so effectively making a full length hugger.
In the end, I decided I actually didn't really like that whole swing arm mounted unit. When I dismantled it I realised just how heavy that assembly was. Definitely worth getting rid of that thing, just for the reduction of un-sprung weight if nothing else.