Yes Doby saw that tip about scuffing up hull and tube from you earlier in the thread. I found this in an older thread on here. Seems like a easy enough process to follow.
Stuffing Tube installation:
To "determine the angle" of the stuffing tube slot, I mount the motor, then put a 3-4" rod or piece of flex shaft in the collet. The hull end of the shaft will point to the right spot to drill the first hole. From the bottom of the hull pencil in two horizontal lines on each side of the hole, aft (towards the transom) from the hole the same diameter as the stuffing tube. Then use a rat-tail file about the size of the hole (or file of your choice) to make to make a 3/4"-1" long slot towards the stern. File the forward end of the slot just enough to match the angle of the motor shaft. To smoothe out the horizontal sides of the slot, use a flat bastard file. EZ to file off too much, so go slowly.
To align the stuffing tube with the prop strut/motor shaft, mount the strut, adjust it so the bottom of the strut is even with the bottom of the hull & horizontal (Placing the hull on a table or other flat board makes strut shaft alignment EZ). Then firmly tighten all strut screws in perparation for mounting the stuffing tube. Installing & aligning the stuffing tube take trial & error & time.
1. insert the stuffing tube from the hull bottom to 1/2" from the collet, then into the strut.
2. The tube should be level horizontaly with the strut. If not, remove, and in VERY small steps, adjust the bend of the stuffing tube slightly, reinstall & check alignment.
Repeat step 2. as necessary until it's properly aligned.
Once the stuffing tube is aligned, seal the edges of the slot, inside & bottom, of the hull with a good epoxy to keep it from rotating under torque.
Stuffing Tube installation:
To "determine the angle" of the stuffing tube slot, I mount the motor, then put a 3-4" rod or piece of flex shaft in the collet. The hull end of the shaft will point to the right spot to drill the first hole. From the bottom of the hull pencil in two horizontal lines on each side of the hole, aft (towards the transom) from the hole the same diameter as the stuffing tube. Then use a rat-tail file about the size of the hole (or file of your choice) to make to make a 3/4"-1" long slot towards the stern. File the forward end of the slot just enough to match the angle of the motor shaft. To smoothe out the horizontal sides of the slot, use a flat bastard file. EZ to file off too much, so go slowly.
To align the stuffing tube with the prop strut/motor shaft, mount the strut, adjust it so the bottom of the strut is even with the bottom of the hull & horizontal (Placing the hull on a table or other flat board makes strut shaft alignment EZ). Then firmly tighten all strut screws in perparation for mounting the stuffing tube. Installing & aligning the stuffing tube take trial & error & time.
1. insert the stuffing tube from the hull bottom to 1/2" from the collet, then into the strut.
2. The tube should be level horizontaly with the strut. If not, remove, and in VERY small steps, adjust the bend of the stuffing tube slightly, reinstall & check alignment.
Repeat step 2. as necessary until it's properly aligned.
Once the stuffing tube is aligned, seal the edges of the slot, inside & bottom, of the hull with a good epoxy to keep it from rotating under torque.
Now just waiting on all the hardware 
I bet it would really fly with that 
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