has any one tried the Tigress clamp on riggers

No

Tigress is a good name, But clamp on riggers does not sound good.

they clamp on to the t-top frame

Ok

I know what your talking about, do they come with poles? How long are the poles? Diameter?

15'

you can get the kits in 1 1/8 or 1 1/2

i like the taco's but not the price

Im curious about that also. It looks to me like the weak link would be it sliping on the top pole. Seems to me that if it did slip you could drill a hole through both the mount and the tops pole and put a stainless bolt through both.

Try hulltruth.com with your question. Its a national site.

I was looking at the tigress mounts awhile back. If I remember correctly it seemed that even though they were "Clamp On" on the inside of the mount it had a 1/4 inch nub. You have to drill a small hole in your t-top's tubing for the nub to fit in and it prevents the mount from slipping around the tubing.

Dolph