Steve asks others in the hobby for help:

“I have constructed a near-ceiling shelf quad-circular track and have come up short in various locations. Since Bachmann only makes a limited selection of G track, what is the best method to alter both straight and curved track? If anyone has been successful doing this, please respond with a step-by-step procedure that you’ve found successful. I have already tried using a fine-blade hacksaw and a Dremel cutting wheel but have run into difficulties maintaining and straight and clean cut. Many thanks in advance!”

If you can help Steve, then please use the comments link to add your suggestion.