Swede#1 the buttons have only changed once and it was close to a year ago that the old stock was replaced.

Stay away from Rc-toro his engines have the serial numbers ground off and will not be warrantied or eligible for contingency.

Amain should have 5ports in stock soon, we have had 5ports in stock for awhile now, they are not currently back ordered. We did have a run on Turbo buttons and turbos are back ordered, but the price of 2 o.s. p3 plugs is the same as a turbo button and the standard version comes with 2 plugs for break in.