A couple of months ago I added tennis balls to the cart to keep the dreaded flat spot from happening to the AI.
http://www.hobiecat.com/community/viewtopic.php?t=6673
This has worked out well, but has also shortened the cart's reach, making it impractical for the deeper hulled models like our new Oasis.
So I simply extended the reach of the cart so it can now be used to transport all models without fear of piercing the scupper holes.
Here's how:
Materials:
-- 2 pieces, 1/2inch schedule 40 PVC pipe, 3 inches each
-- 2 slip / thread 1/2 inch couplers
-- Duct tape
-- PVC primer and glue
-- epoxy glue
-- sandpaper or file
Procedure:
1. pry off the top cart caps if they are still there.
2. Since the connectors have a slightly larger outside diameter than the cart tubing, you must file or sand them down to match. I adapted a drill to use as a "lathe". When finished, they will fit something like this (note the slight bevel on the top):
3. When done, prime and glue them to the 3" PVC pipes, wiping away extra glue. Take 2 turns around the pipe with Duct tape (= 5 1/2 " long) to fatten them up for a snug fit in the cart tubing.
4. Check your fit and adjust as necessary; then epoxy the extensions into your cart tubes:
The cart cross bar now stays clear of the hull, eliminating your dent problem...
... and properly extends all the way through the hole for a safer, more secure ride for your boat:
You don't need the threaded ends, but if you find the need to extend your cart further later, you can simply thread in whatever you like.
Tip: If you bevel the top edge of your extension slightly, this will help the cart to slide past any ridges inside your scupper holes.