The Palfinger on this truck is the bigger brother to the one we've had on our Medium Recovery Vehicle (MRV), a 6x6 Mercedes Unimog, since the late 90's. It's a brilliant peice of kit in itself with the option to use the vehicle/crane mounted levers, use a remote with 30mtr extention, or wireless upto 50mtr away. The Yellow part's (ie: the cab itself) on the second version of the model was from the Italeri Superliner kit, unfortunately a highly inaccurate kit even if it was extensively modified to represent a Mack it'd still have issues (i'm not a fan of Italeri kit's on any level). The RM series i'm building however, required extensive modifications to the cab shell and almost nothing else was even close to being right, so yeah, i've done pretty much everything there myself either completely from scratch or extensively modifying the Kit parts or resin parts from other compaines. The high roof serves a number of purposes, the inside of the cabin does have slightly more head room now, but it also houses the A/C unit and the top of it is firm & flat and is covered with a non-slip coating to enable us to stand on it to guide vehicles onto the trailer etc.