Wow, just wow! What a project.
We would love to see any and all pictures you have.
You could post pictures to the FG Seneca group;
https://www.jaycoowners.com/forums/g...on+owners.html
You could also create a Registry for your Seneca here;
https://www.jaycoowners.com/forums/registry
Thanks for all the detail regarding the slides. We need to adjust ours and had no idea if the PG in the Seneca used rollers or not. It will make the job simpler and less worrisome, for us.
Sorry but we can't offer any insight on the step well, might need to make a new one from MDF and steel braces?
Please let us know when you have posted pictures.