Originally Posted by veecee

Which 417 do you have? 417 and 417X needs 1mm spacers on top of the front & rear bulkheads to lift the upper deck by 1mm. This is illustrated by the pic below on the Smokem website (note the 1mm spacers sandwiched between upper deck and rear bulkheads:


Also no spacers are needed on top of the Smokem centre post.

If you have a 417V5, you do not need any spacers to raise the upper deck. It is a straight bolt-on.

And unless you have loads of grip, you don't need to add the extra 2 screws to bolt the upper deck onto the motor mount and layshaft bulkhead. Just run the middle screw that bolts into the Smokem centre post. Again, check the above pic. This is the default setup that seems to run the best.

If you do the above, the conversion will run as good, if not better, than your standard 417 running identical setups. As narcotiks suggested, post your setup so we can see if we can help.