Let me quote some key passages from Dawson, Dawson and Summerfield on Manhandling Guns - pages 222-24. (An excellent book if a bit dear at £29.95 but I have seen it it remainder shops recently for much less. )
“For short movements on the battlefield, rather than bringing up the horse team and risking exposure to enemy fire the gun crew could manhandle the gun into position with drag ropes (bricoles), which were first used by Prussia in1722….into Austrian service …in 1753 and to France by Gribeauval in 1756.”
Then:
“In trials… in 1764… Gribeauval championed the use of the bricole…..The gunners proved quite capable of manoeuvring with the body of troops without impeding their movements; there were even times when they out performed the body of infantry.”
and
"The bricole did not give the French an overall advantage as it was used by most of the nations of Europe.”
I think this shows it was well established by 1792.
This is not designed to move batteries long distances when not under enemy fire - limbering is perfectly adequate for that - and the bricoles etc also could be attached to horses not just pulled by gunners without actually using the limbers (and were see the original contemporary print on page 223 of a British 6pdr being pulled this way). It does enable field artillery to keep up with infantry at least to some extent (certainly when in line) and is implicit in the artillery attachments. Also with the French and Spanish in the 1790s continuing to use civilian drivers this may have been the best way to get the guns on the move!
The question is whether the distance of 2 MUs is excessive but the turn represents about 20 minutes so...? I think the challenge would have been if we had not modelled it!
