Once again web surfing has proven fruitful. These are links to a site called Instructables which is a do it yourselfer's paradise for a lot of things. Make Magazine also has a large web presence, but what they both have in common is low tech, low drag elegant solutions for the disabled, that you can make yourself! If you stumble across a good site, please post it here.
I am not associated with, nor have any financial interests in these site. Simply, they present great alternatives to $$$$ modifications. Please exercise your best judgment when using these solutions. Appleseed, myself, nor contributors have no liability for any injuries resulting from use.
While these topics presented deal with kayak solutions, they can be adapted to other things. Check out:
Kayaks
"Dual-Motor SIP&PUFF Controlled Kayak System" (http://www.instructables.com/id/Dual-Motor-SIPPUFF-Controlled-Kayak-System/) Dual-Motor SIP&PUFF Controlled Kayak System. Retrieved from Web site: http://www.instructables.com/id/Dual-Motor-SIPPUFF-Controlled-Kayak-System/ (http://www.instructables.com/id/Dual-Motor-SIPPUFF-Controlled-Kayak-System/)
"ADAPTIVE PADDLING FIXTURE FOR KAYAKING" (http://www.instructables.com/id/ADAPTIVE-PADDLING-FIXTURE-FOR-KAYAKING/) ADAPTIVE PADDLING FIXTURE FOR KAYAKING. Retrieved from Web site: http://www.instructables.com/id/ADAPTIVE-PADDLING-FIXTURE-FOR-KAYAKING/ (http://www.instructables.com/id/ADAPTIVE-PADDLING-FIXTURE-FOR-KAYAKING/)
"ADAPTIVE SEAT FIXTURE FOR KAYAKING" (http://www.instructables.com/id/ADAPTIVE-SEAT-FIXTURE-FOR-KAYAKING/) ADAPTIVE SEAT FIXTURE FOR KAYAKING. Retrieved from Web site: http://www.instructables.com/id/ADAPTIVE-SEAT-FIXTURE-FOR-KAYAKING/ (http://www.instructables.com/id/ADAPTIVE-SEAT-FIXTURE-FOR-KAYAKING/)
Plastics Repair, kayaks & canoes
"How to fix a plastic kayak or canoe" (http://www.instructables.com/id/How-to-fix-a-plastic-kayak-or-canoe/) How to fix a plastic kayak or canoe. Retrieved from Web site: http://www.instructables.com/id/How-to-fix-a-plastic-kayak-or-canoe/ (http://www.instructables.com/id/How-to-fix-a-plastic-kayak-or-canoe/)
"Fixing a plastic (polyethylene) kayak with a hole in it" (http://www.instructables.com/id/Fixing-a-plastic-polyethylene-kayak-with-a-hole-/) Fixing a plastic (polyethylene) kayak with a hole in it. Retrieved from Web site: http://www.instructables.com/id/Fixing-a-plastic-polyethylene-kayak-with-a-hole-/ (http://www.instructables.com/id/Fixing-a-plastic-polyethylene-kayak-with-a-hole-/)