Let me start by saying this is my first post on RCNT and hope my advise is useful to anyone willing to read it. My impression of the reverse module for the Hpi Savage isnt a pleasant one, I purchased the module off towerhobbies for 37.99 and when I received it I found out it wasnt worth the 40 dollars I spent on it, it is very poorly engineered very flimsy and half the time doesn't work correctly. Let me first point out that this is a VERY time consuming operation, you have to practically dismantle the entire to truck to gain access to the gear box to install the unit. secondly the instructions with it are near next to useless, they contain no guiding text, only pictures describing what you need to do. Next thing is that it doesn't come with a servo, so you have to purchase one of those on top of it as well. On the performance end of it, I notice that it seems to rob power from the truck, dont ask me how. everything seems to moving correctly, but it does seem to make the truck more sluggish and not as responsive. Lastly the part is made of very poor components the arm that controls whether the module is set to reverse or forward is flimsy and doesn't lock very well, and doesn't go into reverse or forward as easily as it should, you almost have to pick it up and help it out. All in all the concept is great and the benefits high, but its not worth the time effort and money to install this on your savage! Hey its only reverse, who needs it anyway!