Hey Pete,

I intsalled the OS. FS-90 in the D-VII last night. I was able to use the port side mounting holes for the mount when viewed from sitting in the cockpit. Then I knocked out the 2 remaining blind nuts and filled the holes with dowel stubs. I mounted the engine on the
H-9 supplied mount set the engine and mount on the bench top and measured 4 7/8" to the thrust washer and secured the engine to the mount. I then bolted the whole thing to the port side blind nuts and was then able to mark the hole centers for the right side mount. I had to remove the fuel tank,(17 oz. ounce......whew that's a big tank!!!), and will have to recess it futher back from the firewall. With the OS. F-90 the valve train is to the rear of the engine, which pushes the carb futher back and this caused clearance problems for the tank set-up, the lower gear case was right up against the fuel lines and copper tubeing from the tank. I have some clear blue hi-temp (I hope...) tubeing that fits the FS- 90's exhaust elbo that I was able to run inside the fuse between the engine mount and the fuse side down and out the botton and snake it through the landing gear legs. I hope the tubeing is hi-temp because this solves the exhaust problem and it doesn't look half bad. I also installed the radio gear, still have to check the servo end points to set the proper amount of deflection on the flying serfaces, the throttle is all set. Computer radios are great........... When I think back to the standard radio systems and having to mess with the linkages for the servo travel end points and moving the servo arms from side to side to get the serface moving in the right direction................ and on and on......... My 1st. radio was a 5 channel Heath Kit which I built back in the 70's, I think I paid over $200.00 and I still had to build it!!! If all goes well I hope to get the tank installed today and set everything up and weather permitting may try running the engine. Sorry if I got off the DR-1 subject, but what the heck, D-VII, D-R1........IT'S
ALL GOOD!!!!

Bill
P.S. Pete thanks again for all the info and I will check the thread on the D-VII.