Yup, I know the feeling--I've got several on the desk right now also......hopefully I'll be able to get the final paint color on my 75 yet this weekend and then start final assembly.
I did some surfing and found a review of your kit that mentioned having to trim the cylinder heads to fit into the Hobbycraft cowling. I ended up thinning my cowl somewhat to clear the cylinders, but that was after I'd reshaped it to the rounder configuration. Other than that it has been a fairly easy process.