Chainsaw Repair

101 sounds right on the money referencing to 028 to an 038 AV.If that holds true the stock squish is probabley around 45-46 thou .If that's a fact you can safely drop the cylinder 20 thou or so .

If you are hesitant pull the base gasket which is around 20 thou and swear a coating of permatex number 2 which will seal it up enough to at least test it .Without raising the exhaust it should peak out slower but with a tad more torque on a test like that .

Don't get in a rush,take it a little at a time .You can always remove metal but it's a beech trying to put it back .

Another hint : if you only widen a port some what you have not changed the port timing although by dropping the cylinder without cutting the base you have .Now if you choose to cut the base and raise it back up to stock 101 you again have not changed the dynamics of the timing except you've increased the blow down duration  .If you raise it say 4 degrees you've effectively added 4 degrees more blow down more or less .

Remember though it's not totally liniar because of the angle of rotation geometrically speaking because of the position  of the crank throw with respect to the rod and piston position .Measure often and cut slow .If you have to slide the cylinder back on a half dozen times it's no big deal .Better safe than sorry .Rome wasn't built in a day and you can't report a saw in half an hour .