Hi Hawken fan;I like em too.Dave here in Wva.I have seen this job done several different ways,including the brazed on like you did.The latest hawkens I have built,and had built,were done in this fashion-the stud threaded for whatever die works-mostly 10-24 or 32,then the guard located on the triggerplate as is sufficient to get gloved finger into guard.Then location marked,center punched,on trig plate,drilled out for the 10-? tap,and fitted in this way.You can then locate the rear screw,and drill,tap,and fit rear of guard.Others on here will be along with better info,and some links.Good luck.BTW,do you still have the hawken you brazed guard onto?I bought one built in 60s a couple years ago,from Nebraska and it had guard brazed on..best regards,Dave