Yep, it was
@WesleyInman that mentioned the SR9009/RAD140 combo in another thread and it was great advice. I do it TD PWO (morning fasted cardio, afternoon lift). I add the Cardarine occasionally for an added cardio kicker.
I'll up the game and try inj SR next time I see it available and on sale. There was one forum sponsor that had it but they are no longer a sponsor.
Heavy sparring days it was TD SR + GW and the combo was good too. This was before I added RAD to the SR.
I can't comment on SR9009 solo. I added it to Card then later with RAD so I never ran it solo. But, I can say when added to GW, the cardio output capability noticeably increased.