Griff, not to shit on your parade, -and tone wise it will probably not matter (much)- but the main cap in
the original Rangemaster circuit is a very uncommon 5nF value. Not the more common 4.7nF or 5.6nF. I see you went for a 4.7nF Mallory cap.
I built a few myself back in the day, sourced actual NOS 5nFs and used orange drops for 2 other values, so you could switch between 3 modes of boost (Full/Mid/Treble).
By the way, totally agree with your response to Steve regarding the two images he posted. That's no proof whatsoever.
The 'NORMAL' and the 'RR' have the same amount and same TYPE (e.g. tantalum and ceramic caps) of components. It is a really simple circuit and very closely related to the DOD 250 and MXR Micro Amp.
The DOD 250 (a 90's reissue) was my first venture in modding pedals; replacing the stock 10nF input cap with different values (and NOT the shitty 1nF that the DOD YJM308 pedal used..."ALL YOUR LOWS ARE BELONG TO US"....
), swapping around the diodes, swapping IC's, adding a Boss 9V power socket (instead of that stupid center positive mini-jack) and ofcourse, true bypass switching and a 3mm blue LED.
Later on, I added a toggle switch for the input cap; I think it switches between 15nF and 33nF. 33nF is great with single coils and the gain low, so it acts more like a colourful, full-range, almost-clean boost.
Notice Steve, I haven't called you stupid in this post. But as a fellow (former?) pedal modder/builder and MXR collector (see *proof* below ;-) ), I fail to see the actual proof that some folks asked for; if Randy's PERSONAL D+ was modded yes or no.
And perhaps it was as simple as swapping C1 (input cap) from 10nF to possibly a lower value, to make it less flubby at higher gain positions.
Circuit of the D+ is explained
here. 1N34A are (pretty low forward voltage) germanium diodes. The DOD 250 used silicon diodes with a higher forward voltage; meaning, more possible volume before distortion appears AND a different character of gain structure. You can replace those with green or yellow LEDs (even higher forward voltage; red LEDs have a lower forward voltage usually) and you get even more volume from the pedal.
Something that on one hand the D+ could've used, since you have to crank it at least to 3 'o clock volume wise to even reach unity gain.