congratulations .
I grew up w rotisserie attachment on a charcoal BBQ w a semicircular hood
you added to the charcoal gill when you wanted to use the rotisserie
way before Weber et all. two chickens chickens rotating every Sat or Sunday .
whileI mowed the grass /
I got Weber a long time ago specifically for adding a rotisserie attachment.
remembering this.
my advice : if it fits , do two chickens at the same time .
after the Chef consumes all the skin
very nice leftover for chicken salad etc .