position blade 35 at any angle up to forty five degrees 45 u00b0 relative to table 12 to produce angled cuts on a section of rigid foam panel 50 when desired still referring to fig3 carriage assembly 25 is adapted for sliding movement along crossbar 24 as indicated by directional arrows 55 for traversal between posts 18 20 during use carriage assembly 25 includes a setscrew 31 to lock it in position during the cutting procedure in this manner blade 35 may be positioned at a width dimension u201c d u201d in relation to fence 14 corresponding to the width dimension of a rigid foam panel 50 fig5 to be cut as explained hereinafter in further detail in one embodiment blade 35 is symmetrically tapered in cross section when viewed at its circumference along section line 4 b 4 b as most clearly shown in fig4 c blade 35 is manufactured from conventional hardened steel or other suitable material it will be noted that in this configuration blade 35 tends to maintain a sharp cutting edge as at 35 a by repeated burnishing of blade 35 against the aluminum foil moisture barrier 50 a of a rigid foam panel 50 during the cutting operation in a method of use of the present invention the cutting system 10 is assembled as.