good onya for getting a twister.  
i am in the process of changing the clear modular stand up targets (7 of them) to a bright yellow modular colour on my twister and getting rid of the standard silvery/clear colour. it will give the playfield a bit more zing with the bright yellow.these stand up targets are avail from mark when he has stock or marco spec in the usa.cheap at $10 to $15 aussie each..

* make sure mark makes the flippers snappy and the ball shooter strong and snappy so the game is fast after a playfield wax.
during the game, the fan ontop of the backbox kicks in for the wind effect which is also neat, and make sure the spinning disk on the playfield (representing the twister-hurricane) works with the magnet which will suck all the balls during multi-ball onto the disk, then sending them all off in different directions at once.cool effect.  

enjoy your new pin. congrats.