Forest Goop!

I just added “Goop” to my TT1200 tyres, I have used its close relative “Slime” in my mountain bike tyres for years, once I removed a tyre to find 6 green dots on the inner tube where I’d had punctures I wasn’t even aware of.
So put it in earlier and I’m out for a ride now, I can vouch that it doesn’t affect wheel balance having just ridden at speeds up to 70 with no issues, whether it’ll stop punctures remains to be seen of course, I’ll probably get my rims adapted to tubeless in the future but hopefully this will work until then, here’s one of Del Boys videos on the subject.
NB I put my bike on paddock stands when I did mine, didn’t want the rims bearing down on the inner tubes.
PS I also cleared the goop out of the valve bodies with a cotton bud before refitting the valves, not sure this was necessary but only took a sec.
Note, his comment on using virtually no force when tightening the valves is correct, finger tip torque only!.