re the conversion - if possible, spend some time sitting in the AC before you fly it - go home and "fly the bathtub". Close your eyes (yes, in the bathtub if the desire takes you), and visualise where every switch, button and anything else is. Next pick up the checklist and go through every normal and emergency action, visualising where each switch movement will be. Sounds stupid, you feel like a prat doing it, but the last place you want to be is behind that twin. For me this helps with any type conversion.
One other piont, fly the bathtub for your engine out as well. Dead leg = Dead engine. i.e. the leg you are not pushing is the one on the side the engine has failed.
Last point, have fun and enjoy it!
RIX