Smile [Q] Xperia Tablet Z Recovery Issue

Hello!

I've just finished following the guide http://forum.xda-developers.com/show....php?t=2295694

It has definitely flashed the recovery, which is great.
However I cannot boot the recovery using any kind of key combination.
The only way I have found to access it is by booting into the current stock ROM, and using the CWM ROM Manager.

My issue is that if I want to flash a different ROM (AOKP when I figure this out), if the ROM fails and won't boot, I can't get back into recovery to fix the issue or re-flash a different ROM.

I don't want to end up with a bricked device.

I've done a lot of reading and it seems like a common issue, but no real solutions

I'm more used to flashing Samsung devices

Thanks for any assists!