I have a SAKO L61R in .338 Win Mag that I got for some Long Range shooting. HOWEVER-- THe SAKO has the Dovetail integral bases and the L/R scope, 6 x 25 has big tube 35mm Weaver type rings. I need to get a weaver or Picatinny rail mounted on the Dovetails. Gunsmith here says he won't drill the Dovetails to install the rail, says its too thin? ANy ideas?