My first attempt at cutting a rail gap on Comstock Road with a motor tool cutting disk did not produce satisfactory results. Maybe I am just picky but this looks terrible.
Not the effect I am going for with the baseboard joints. To remedy this, I unsoldered the left side, filed the ends square and resoldered the rail closer. This looks like it will do.
I will have to figure out what to do in general. I can’t use my jeweller’s saw since I can’t get the blade down horizontally that close to a surface and the underside at the joints is encumbered with support structure so no drilling a hole and slipping the blade through.
Best option I have so far is to butt separate pieces up at the joints. It makes alignment a bit of an issue but it is more or less how I do it for regular joints anyway. Joint bars are applied afterwards merely for cosmetic effect.
The sharp eyed viewer may notice that the plastic tie plate on the left has melted during the resoldering operation. Not entirely unexpected but I was relying on those spikes to maintain alignment. It will be scraped out and replaced. It also serves as a caution about in which order soldering and tie plate installation need to happen.