bought a set of the LALA arms off him couple yrs ago for my discovery pro when he was doin them on a thread here. finally come around to some free time to spare here and thought I'd finally start putting this thing together. I need to cut 4 of these 20mm tubes down in length and was wondering what the easiest and cleanest way to cut these and leave a nice finish in the process. kinda wonderin if one could use a plumbers style pipe cutter?? any tips guy's???