Just bought an Elise with Audi TT engine

It has 239 HP and really rocks !
I recently sold my Exige (fiscal reason) but wanted a Lotus again
I am now going to put a tiptronic transmission in it (I drive a lot in heavy traffic and I have a bad left knee : 30 min traffic = knee swollen and painful)


Do you know how much the TT engine weight? How is the car balance?