Retrol HM-01 Hit & Miss engine. In 2023 I pre-ordered a Retrol HM-01 hit and miss engine from Enginediy which I knew would take a couple of months for delivery because it was still in pre production. I was happy to wait and I was kept informed of progress and expected delivery. It duly arrived very well packed and beautifully made. This was my first attempt at building an engine but it went together perfectly. The instructions were mainly pictorial and a little more written description would have helped but all my questions were promptly answered by their excellent service department. I have been running this engine for four months now and I’m delighted with the design and quality. I would certainly recommend Enginediy and will be using them again.

Total satisfaction. Have been in contact with the guys at enginediy regarding a shipment from them. The model engine was not only sent quickly and received within a few days, but the quality of the kit was outstanding. I didn't know what to expect with this sort of kit, but I really am not disappointed. My communication with them afterwards has always resulted in swift and very friendly replies. I would have no hesitation in dealing with them again. I definitely recommend them.

Great and Respectful Service I like EngineDIY because they always do what they say they will do. If you have any problems assembling one of their excellent kits, an email to enginediy.com will get you a quick reply. I recently purchased a very new model. Understandably, there have been a couple of production bugs, causing me to email EngineDIY to ask for replacement parts. They were sent to me without complaint as soon as they could source them. You are safe with EngineDIY. Recommended!

44cc Small block Hottie V8 engine This is my second engine directly from CISON. My first was the V2 15.7cc Harley Davidson Engine and now the Chevy small block V8. Both, I am very pleased with because both came directly from the manufacturer in China and the price compared to buying them in the U.S. is much cheaper directly from China. Customer service is absolutely great! I hope you are lucky enough to speak with Lucas! You can usually get a response very quickly. My experience has been within 24 hours! I first contacted CISON about a Hall sensor that went bad on my V2 engine. I had the sensor in my hand about 10 days later straight from China. My second experience was for instructions to assemble the V8 in English. I was immediately sent assembly instructions in Chinese that Lucas said would be converted to English and sent to me later. I actually converted the instructions to English and sent them back to CISON before they could do it! I simply used adobe to convert the document to word format in Chinese and then converted Chinese to English! They were very appreciative to me beating them to the punch. I am still in the process of assembling the V8 and will post videos to YouTube immediately when finished. These model engines are a real work of art and very mind blowing! Today I demonstrated the Harley Davidson engine to automotive students at my school and they were totally blown away that it actually runs..... myself and the instructor showed the partially assembled V8 engine to the students and they can't believe something that small and realistic actually work and runs! They wanted to hold the block! The price you pay for these engines is small compared to the WoW!!! you get from future automotive technicians. My plans are to purchase another one and donate it to the school. These things are great conversation pieces, fun to work on and even great to just look at! I love my purchases from CISON because they're trustworthy, reliable and better to purchase from than local. Stay tuned for my first videos on YouTube that will demonstrate problems, fixes and downloadable instructions in English. My first video will show what's in the box? Assembly and then running! Stay tuned...... I'll be back!

Is this place legit I placed an order on 27 November 2023. My credit card was charged immediately. I did not receive an email informing me that the order had been received. I have no shipping date, tracking number or any information from enginediyshop.