Bought the Ebay riser/extensions (China) and have to say they are very good quality. No lead bolts or Harbor Freight grade material. They set the handlebars back toward you about 2 inches and I also rotated them down just a bit. Have to say it makes a big difference and definitely recommend them.
There is a video online that shows how to install them and there are three or four zip ties you have to be sure and snip. The only issue I had was the brackets for the clutch and front brake seemed a bit too long so I installed a spacer (square nut) in between the bracket and where they mount. I'll attach some pictures.
Also mentioned in another post, Jon at
Helibars.com said they are looking to develop some better bars for the R18 and Classic. They just recently started making upgraded bars for the R18B and TC (which to me felt perfect already and would be a great option for the Classic if they only were interchangeable which they aren't). Jon did ask if anyone around Southern Maine would like to volunteer their R18 or Classic for development of new bars. Might get a free set of installed bars perhaps?