Sorry for the loooooong delay in responding, Simon. I have been away from the forum. Happy to share what I can about TriStars with you. (I'll try to get here more often).

Hi Doc
Have been reading the blog and your support of the Horstmann Designs.
Would like to hear from a current owner with as much experience as you have.
I am in the US on Hols at present but normally reside in OZ.
Will wait to hear from you.
Regards
Simon