I can't say anything more than dmg :
and how did you manage to include additionnal bars on the studio version that don't include these additionnal bars ? (I mean the ones just before the twiddy bits)
What do you mean with "additionnal bars"? Sorry but I don't understand
I guess you used the backnig track coming from the guitar hero game ? the one with all original instruments except the lead guitar ?
if so, it is the original studio version.
In this version, Mak played the twiddy bits right after the "descending scale" (sorry for my english, can't find appropriate words) around 5:12-5:20
on 20/04/78 if memory serves, they rerecorded the song for the single edit, and then for the 1st time, Mak added one "cycle" between the "descending scale" and the twiddy bits : 5:40-5:46
and then he used to play these bars in every live version until recent years (I guess 2010, but not sure) where he returned to the original version like on the album, that means the twiddy bits right after the "descending scale"
on your recording, you are playing theses "adding bars" : 5:23-5:30, but if I'm right the backing track is the original version without these bars, so I wonder how you managed to match the length of your solo with the length of the backing track, and the matching with drums fills, etc....
hope it's clearer