I used the original back-in the day for a pct after the original PP.
I think I did 6 weeks but can't remember.
I didn't gain much; I think around 4-5lbs but I was eating below caloric level (1000 cals below weekly).
Also, I never noticed much, if any, strength loss during those 6weeks. I actually set a new maximum on bench during this time, albeit, just 10lbs more.
I ran it with powerful, and toremifene, and a crap load of fenu for 4 weeks then continued JW for 2 more weeks...
This was a few yrs ago. There's tons I don't remember though so take this with a grain of salt.
Edit for caloric correction.