I have one of those TSP type units that has been sitting here for 10 or 12 years. Those were sold under several different names. I bought it on eBay when they were selling them for $70~80 with free shipping. I used it a while and it worked mostly ok, but it allowed oil to run up between the shaft and the housing and from there it would dribble out from under the cap in a big mess. I figured someday I'd make a seal for that and keep it in case my Langdon's HEI had any trouble (which it hasn't). You know those TSP units were not made in the USA, yes?