Dometic Penguin 2/ Armstrong Replacement

[Speckc]

Greetings -

I'm planning to replace the original Armstrong T-10 with a Penguin 2 in my '64 Globetrotter. To those that have experience with this process, what challenges can be expected with the retrofit?

- how much cutting can be expected?
- will additional support bracing be required?

Any insight would truly be appreciated.

Thanks