Until I decide what type of new bike I'd like to buy, it's been changing from month to month if not week to week over the past few years, I'm thinking of adding a rear derailer to my Raleigh Trent Sports, aka poor man's Lenton Clubman. I've got it set-up now so that it suits me well for the majority of my rides. But, I would like to expand the gear range to tackle some of the hills in my area by adding a rear derailer. I've researched the old Cyclo, Hurret, Nivex, Raleigh products as well as some of the newer Shimano items but am not sure what to use. I will most likely use only two cogs on the rear wheel, it currently has a S/A FW hub, so I don't need anything too fancy. Something "period correct" would be nice but I also would like it to work well. What's your thoughts or recommendations? Thx in advance, PG.