On another forum, there is a tutorial for plastic welding -
plastic welding tutorial
http://tinyurl.com/bo5ynqy
I use zip-ties, and I have a larger soldering iron. I forget the wattage. I'll add ABS cement an what not to my collection of tools and stuff.
The speedo on the Xingyue - painted/inked plastic. I haven't broke one to repair. I have a "45" sticker stuck over the 65, which is a square black silhouette at night with the back light. A loose template that could be indexed for speed correction would be cool. I'd like to clear the backpane and mark it out for correctness.
Steve