Power tonneau cover question

[CwBotner]

Thanks for the add. Greetings All!!

Going to start my membership, by asking what I hope is an easy question.

On an online site, they have a deal on a power retractable tonneau cover that I really like, (like same price as non-powered), but I also just installed a Weather Guard tool box. 

My hope/want is that I can put the retractable canister in back of the toolbox, (tailgate side) and then mount my onboard air tank under it, with the compressor in the toolbox.

Finally my question is; will the electric cover stop at my tailgate automatically? I understand I have to cut the rails to accept the canister in the different location, but the cover stopping in the correct stop has me guessing what other mods I’ll have to do.

please help ASAP, as I do not know how long this deals gonna last. Thank you!

Collin
 

2018 GMC Sierra Denali 3500hd