Anyone fitted spacers to their Honda RB3 wheels?

For relatively little (less than $30.00/pr), I can get some 8mm (rear) and 5mm (front) cnc'd alloy spacers for the factory 17" Ody wheels.
Just looking to get the factory wheels to fill out the guards a bit more until I replace my tires and then get my lease to fork out for all new wheels with less offset.
I'm figuring that if I stick with spacers no thicker, I can get away with the standard bolts but would welcome comments and advice about this.

Anyone else use spacers as well?
Just interested in your feedback.
(and yes, I know it's not entirely legal here in Qld)