I have altered many forends from beavertail to splinter. In most cases the major "flaw" is the way the inletting looks when done. A beavertail fored fits around the barrels and therefore the gap under the barrels are not evident to the eye. A splinter forend is fitted under the barrels and the fitting is closer in order to get a proper lock up. In a perfect world there would be no difference between the two. Reality is that what you can't see you don't complain about. FWIW, have a new forend made instead of altering the old one.
