Garage door motor wiring question...

Here is an image of the current setup.

Here is a couple the PDF shows the reverse switching and the PNG the triac controller.
Max.
ex Oxfordonian!

Thanks so much for this!

I ended up solving this mechanically (found a speed reducer on ebay that normally goes for $600 new going used for $60). That solved the whole thing in basically one step. Just needs about 15$ more worth of a v notch pulley and a belt.

Thanks for all the help, however!