This converts any wormdrive saw into an accurate chain cutter beam saw complete with riving knife for timberframing. Probably not as safe to handle as the 16" circular saw, but much more affordable.

The Prazi USA PR7000 Beam Cutter (for 7-1/4-Inch Worm Drive Saws) cuts angles up to 45 degrees. The vertical foot-plate and built-in sight allow smooth, exact square cuts and ensures gliding manageability while cutting perfectly straight lines. With a 12 in. cutting capacity, you can professionally execute the following cuts and many more: rafter pitch cut, miters, stairs, arches, log cuts, compound angles, bandsaw cut, notch 6x12 panels and ripping. Fits Skil models 77 and 5860; Makita model 5077B; Milwaukee models 6377 and 6378; Black & Decker models 2700, 2710 and 3051; Craftsman model 2761; and DeWalt model DW377. Does not work with the DeWalt model DW378G.

from $157.65