The clutch on the Ultron is not the same size as the Losi so we could not use any of the ones we already have, like the trusted MOD Speed Clutch. The Ultron uses the FG size clutch and the go to clutch is the Oddified clutch. We have used this before in the Losi and knows it performs well.

The throttle and break linkage is one of the more “boring” parts to assemble. It's a lot of testing and adjustments to get it perfect. It's pretty cramped on space for the combined throttle and front break linkage so here we had to test a couple of different layouts and shims to get it just perfect. 
The Ultron has two break servos making it possible to adjust the break mix between front and rear on the fly if needed. I think the biggest advantage is that you have two servos delivering breaking power so if one fades you still have working breaks. 
As the throttle linkage come from below we had to swap the arm from the carburator 90 degrees to accommodate this movement.

The pinion and clutch assembly is pretty cool on the Ultron. The system lets you change pinion without having to remove the engine. Is also have one bearing on each side of the pinion making it handle the power transfer in a balanced way without putting too much angle forces on the pinion bearings.

Another quite tedious exercise is to get all the wiring nicely managed and get all the channels hooked up correctly as well as making all the adjustments on the radio, setting up AUX channels, break mix, kill switch config. But luckily I got to test the new wiring harness from NRP. They have provided a presoldered harness especially for the Ultron and 4 servos as well as additional hookups for the transponder and the kill switch. This saved me a lot of hassle. It got a little bit crowded with all the stuff in the receiver box as we're required to use a kill switch in Sweden, and we wanted to hide that in the box as well and just have the necessary cables sticking out of the top hole.