Trevor, sorry for the delay but here's my attempt at processing your RGB's.
I didn't do any additional sharpening - I was just looking at colour and combining the channels in different ways.
The top left is your original RGB image from this thread.
The top right is an RGB using your R,G,B tif's. I combined them using AstraImage and then used levels/curves only to get it looking ok.
The bottom left is an IR+RGB. Your IR image from this thread is used as the luminance, and the RGB image (my top right) is used as the colour.
The bottom right is an R+RGB. Your R channel is used as the luminance, and the RGB image (my top right) is used as the colour.
I hope that gives you some ideas?
Cheers and thanks for the chance to have a look at some planetary data again - even though it's not mine
