any 505s with transom Strops piccies?

nope, i think they've had prototypes made of masts but there isn't alot of point at the moment.

My boat has transom sheeting, takes a lot of getting used to, biggest issue is the turning block at the back end of the boom.

Gybing is also much more fun with no mainsheet folds to grab

Exactly what are we talking about here? I assumed aft bridle with a centre-lined lower block on the bridle and a final take-off ratchet block half way along the boom? The current wave of popularity of that system is, I think, thanks to the skiffs (even if I set up a friend's Wanderer with such a system 14 years ago - but only because we couldn't be bothered to mount a centre-jammer!)

But if you include a travelling lower block on the aft rope bridle (a la Laser), then you can go right back to the 1960's Minisails or even earlier with Snipes, which also used off-the-boom sheeting. To my knowledge the Snipes started centrelining the bridle block by 1975 at latest, though by that time 'off-the-boom' was being replaced by hull-mounted centre jammers.

For 30 years, I've thought that centre jammers were the dog's b's, now I've gone back to off-the-boom with a ratchet block and can't imagine why I've not always done it! Everything in sailing goes in circles, it seems.