That's great! The receiver looks pretty good alright for all your effort.
Take a picture before with the incandescents and afterwards with the LEDs when you are happy with the results (adjust the camera for white balance each time on a white card) and post the pics of your method here? I'd like to see how it turns out, and the next guy doing a CR-1020 can benefit.
The key is diffused LEDs, series operation where you can, and trim the current down for no visual hot spots.
Your CR-1020 feeds the dial pointer bulb only via a 180ohm resistor from the full wave rectifier D713. It is not filtered with a cap at that point. You may want to tie a smoothing cap to ground in case you get any 100/120Hz strobing on your LEDs.
I would tap in before the 180ohm resistor and take the DC voltage (should be around 20v) to get your dial pointer LED matching the 4 others- you don't want it dull or too bright. The 4 meter lights are run from the same 20V (19.23V on schematic) supply.