I am setting up my spoiler board for my long mill 48x30 using the IDC Woodcraft instructions. Program 6 where the board is surfaced is written for the 1 inch surfacing but. I have the 1.5 inch 4 flute bit. The website recommends 12,000 rpm. The gsender file is written at 10,000 rpm. Do I need to change this setting or can I use the 1.5 inch bit as written for the 1 inch bit?