Hi there everyone - Brand new to this so bear with me. I'm bringing a pretty well functioning Royal 10 back to life. Mainly through some cleaning. Steps taken so far are using lighter fluid on keys, white spirit to remove grime on working parts, and some penetrating oil (b'laster) to loosen up some of the rusty workings. I've repeated the white spirit and penetrating oil steps to try and flush out anything each step has dislodged, drying the machine out and getting rid of grime with cloths and air dusters.  

So what's the problem?? Well, since I've cleaned it, most things have gotten better but a tendency for the carriage to stick just before the bell sounds has crept in. This results in letters being typed over one another in one place. Light pressure/tap/jiggle easily moves it on but obviously shouldn't be needed. 

I've tried moving margins, and the carriage spring is nicely wound. I've put a little oil (the kind used for model railways) onto the bit where the bearings and gears slide the carriage along too. I've also tried adjusting the hooks that guide the carriage along so they are tighten and loosen the fit of the carriage but it hasn't made a difference (I was wondering if the play in the carriage meant when it got to the margin the weight of it shifted and caused something to resist its movement but maybe not). 

Any and all help is much appreciated to help me diagnose and fix the issue. Huge apologies for any newbie mistakes in labelling parts etc. I'm getting there but far from having a level of understanding that I think most on this forum will. 

Thanks.