Like DeMac said...welcome. MCI makes a nice bus and their support, even for older models, is good. But as he also said, the design doesn't lend itself to structural modifications.
On a bus with frame rails that provide the structure, the body is basically a shell which sits on the rails...so you can modify the shell (within reason) without compromising the frame structure. But on a monocoque designed bus, the shell/body/structure is essentially a framed tube (think aircraft cabin) so modifications become much more difficult to do without weakening the integrity of the design.
I've done more than 10 roof raises, but all on "traditional" frame chassis buses. Even with that experience, I would respectfully decline any request to do a roof raise on a monocoque bus. It could be done, but it would require engineering expertise that would be expensive.