I emailed Mark at R/C Hardware about engines not on the list. He said it was hard to keep up with all the new engines coming out these days. Their is only a couple hobby shops in his area and most of their engines are what comes on the rtr stuff. He usually buys the HSN housing for a particular engine on-line but sometimes it's hard to get or not available. He told me he's always looking for new engine info and even to help confirm current engines on the list. This is his way to stay on top of things in case the manufacturer makes changes to the HSN during production. He said send him an email anytime and would be happy cut you a sweet deal on some new engine info. Also if you would like to purchase multiple dials for your rigs or group of friends, drop him line with what you got. He will give a discount.

He seems to be really honest guy to deal with. I've purchased from him 2 times in the last 2 years. They took about 3 days to come from Arkansas to California. He said the dials are uniquely made for each engine or group of engines with similar HSH dimensions. They are very precision made and the engraved tuning scale is superior to any laser etching. The tuning scale is resistant to scratches and scrapes and very detailed making them very easy to read.