Reply to "Have you ever modified a "regular" passenger coach into an open air coach?"

I think La Belle makes (or made) kits to make a open sided excursion car. Bachmann makes a nice one in HO scale. They actually have made two. It looks like for the more one elaborate one they followed the prototype of the Disney world cars Which are in turn patterned after Jackson Sharpe cars. The second is patterned after more modern homemade prototypes like those in use at Durango & Silverton.

I like the flip over seats on the more elaborate one. There is a great trolly car like this at Riverside Amusement park in CT that I rode on a few times last summer. Fun stuff.