Do you have any detail pics of your carrier? It looks like the best solution so far. I've drawn something similar but haven't worked out all the small details.
I am happy — indeed, flattered — that you think it looks like a good solution. So far, it has worked that way for me!
The pics I posted above are the most detailed I have, and since we fab'd things incrementally and by trial and error, I have no drawings.
If you were serious [as opposed to merely curious] about building something and some more detailed pics could help, I'd be willing to try to do some photography. But the fact is that I am actively preparing for a 4 month excursion to the remotest parts of the Yukon this spring, so I do have a lot on my plate [and not lots of available time to do otherwise interesting or generous things.]
So let me know of your level of specific interest. Or, perhaps since you live in So Oregon, you'd like to come to Bend and see it first hand?
Best, John