Thanks for all of your input.

I've read through and tried every suggestion with the ABS.. it still will not stay stuck. I suspect the part is just too big to print ABS reliably. As I type this I'm printing it with PLA instead. My concern with PLA is that it might not be strong enough... I'll find out soon.

In addition to being strong enough I will need to find an adhesive that will make a strong air tight bond to other ABS parts.....

That said, does anyone have a suggestion for a proper adhesive to glue PLA to ABS?