How much "usable" height with a cap? (I need 41")

Did a lot of searching (forum and dealer sites) and still not sure how much height I can expect under a high fiberglass cap. I will mostly be hauling my bikes and want them dry and safe from road debris. I do not want to remove my seat post every time I haul a bike so I need about 40.5-41" from the top of the high ridge in the bed floor to cap ceiling. I don't have a Snugtop dealer anywhere near me let alone anywhere in Michigan so they are out but everything else is avail. fairly close. ARE MX and Leer 180 are at the top of my list. I talked to a Century dealer today who suggested a High C but could only say its around 3" above the outside cab roof and once ordered its mine. Would love to hear what some of you have for a high cap and what you measure from bed to ceiling....
Thanks!

 

ARE MX on a '12 DCSB = 41"

Roof seems to have a slight curve downwards at the sides. I measured from the low spot to my bedrug.

 

Sweet, 1/2" to spare!
Thanks

 

Anyone have a Leer 180 they can measure?
I'm still shopping around....

 

Mine is right at 41" with a rubber bed mat.

 

Most caps the height at the opening/rear window is smaller/shorter/less clearance than the interior height. For instance I have a ARE cap the CX style. The interior measurement is 37 inches but at the window frame the clearance is only 33 inches. The MX has kind of a domed ceiling but the clearance at the window frame it may be closer to my measurement.

 

this.

i got caught by this picking up TV's for some friends. what a pain!