June 4, 2022: "...It is becoming more difficult to find good drawings anymore. And to purchase from overseas is a bit un-nerving ($$$)  unless one is absolutely going to erect a particular model. Also, the support you provide is worth every penny. I have an extensive collection of drawings as I do not get to machine much anymore but instead do the arm chair version in my mind while pouring over drawing sets. Thank you one again for providing the modeling world with a good product." Jim Barker, Naperville, Il

Jan 6, 2022: "By the way I have been using Jerry's plans for some time; I have completed the Vintage Stirling (2 of these), the 4-in-1 vacuum engine and the Power House 4-cycle.  The plans and build notes have been detailed, error free and a joy to read.  Are you Jerry's son?  Yes! Please forgive me if I'm in error on this.  A good new year to you from Newcastle upon Tyne"
William Henderson, UK

Dec 13, 2021: "I worked myself through all the (V4) drawings and have already made several parts. It is just amazing the kind of a job your Father did with making those drawings. I know a lot of people would be challenged to fabricate those parts after the drawings, but can't even imagine the challenge to come up with these ideas and to produce such drawings. It is a pure pleasure to pick out and machine any part, knowing in advance that it will fit perfectly into the whole engine."
Ulrich Briner, Duncan, BC, Canada

April 20, 2019: "I was really excited to see a beginner level project,  Powerhouse...I’m 66, always wanted to do machining, and I’m having a blast.  Your Dad must have been a wizard, I’ve seen and read of his projects.  The plans are first rate in my opinion."
Randy Ray, Siletz, OR

July 1, 2017:  "Got the (shipping) refund and thanks again for taking the time to work with me. The PowerHouse engine was the first engine of any kind I had ever built. I bought the plans for the 1906 Bill and the gear charts as well. The customer service you have shown me so far, tells me I'll be buying many more engine plans from you guys. The PowerHouse was a challenge for this first time builder, but that's why I wanted to do it. My goal is the multi cylinder V-twin and V-4." Matt Parker,  Sparta, Il

Jun 20, 2017: I recently purchased plans for the Farm Boy Hit and Miss engine.  I am very satisfied and have been making big piles of aluminum chips.  I have quickly become addicted to this engine-- thanks for making old men toy plans available." Gary Grider, Clovis, NM

Dec 16, 2014:  "Allen, you can be very proud of your father.  He has made the life of thousands of people like me very happy and interesting with his work.  I have built several of his engines and I can't believe myself how much effort he must've put into them. Thank you again and have a very Merry Christmas.  Ernie in South Florida. "

Jul 23, 2014:  "When a company I do business with does an outstanding job, I believe that needs to be acknowledged.  I received my order today, and it arrived in perfect condition due no doubt to your excellent packaging.  I placed this order Sunday evening and received it Wednesday afternoon, less then 90 hours after I placed it!  Fantastic service, and an $8.00 credit back on shipping charges as well.  Good job!  I met Jerry at a PRIME show several years back, probably in Eugene, Oregon.  What a great man.  He was  obviously enthusiastic about his projects and products, and kindly took the time to answer my questions.   I'll be back for more plans and materials!"  Colin McAfee, Aberdeen, WA

Nov 7, 2013: "I would just like to let you know that the package arrived today, expertly packed. The plans for the demand valve arrived yesterday. It was a pleasure to use your ordering system – easy to navigate and well thought out. This should be the way small businesses should work."  Geoff  Kingma,  Toronto, Canada