I'm in the middle of an engine swap from my 1810 to my 1211. I've got the controls swapped over to the 1211 for the Magnum 18. I went to bolt up the engine and it seems as if the 1211 driveshaft is about an inch too long. I didn't realize this until I went to bolt the engine bracket to the frame

. If they're different, is it easy to swap the shaft out? Is there access to it by removing the tunnel cover up top? I'm taking a break from it for the night. I ruined my back wrestling that 18 in there.