On Thu, 16 May 2019 19:47:03 -0400, , yet another
braindead troll-feeding senile asshole, blathered:


The " Instr " link on the web page does give more details :
" secure the base plate using a #8 x 1-1/2" (or longer)
flat-head screws "

"Flatheads"? LOL Yep that's what you blathering idiots are!