The only change between the V1.05 and V1.07 was a change in the PC board layout and a replacement of the original output stage that had proved to be unreliable.
There’s no advantage in changing, in fact it would be impossible, it’s not a possible mod.
Stick with the V1.07!
BTW, for those who keep talking about parallel compression….. the reason this sounds good is that the transients are let through by the ‘direct’ path while the compression is done by the compressor. All that messing about is absolutely necessary when you try to use plug-in compressors or inferior hardware ones….. what very few engineers reaslise is that my early optical compressors did all that automatically, that’s the beauty and the secret of the roaring sound of the old SC2 (and the P38!) The shape of the compression attack and release is what modern engineers are trying to mimic…. but they don’t know why!