Adjusting the brake levers on a Brompton is a PITA if there is much tension on the brake cable! Just did it last night. It can be so freaking frustating as you have to wiggle a little allen wrench in past the brake cable. BUT you can't do that without screwing up the cable until you loosen it. However if you loosen it then the cable end fitting falls out of the little ferrule in the lever itself which is a right major pain in the a$$ to sometimes get back in. A little 5 minute job turned into an hour of cursing Brompton last night all because the freaking allen bolts on the INSIDE!!!

The problem with feeding the cable back into the lever is there isn't much clearance to get it in there because you can't open up the brake lever enough to make it easy. I am not a clueless idiot either when it comes to mechanical things (paid my way through engineering school as a mechanic). I finally took the entire lever off the bike, feed the cable back in and held the cable gingerly and with tension to get it all back together. Take any tension off and it all falls apart again. So now my levers are back on but not really cinched down so I can rotate them without undue pressure to where I want them. I can guarantee that these levers will be tossed soon and I'll put on better cables, levers and brakes! Worst part of the bike!!!!