Rod building can be a somewhat challenging hobby, and getting your guides in the correct locations on the blank with the correct spacing can be done with narrow masking tape, surgical tubing, elastic hair ties, and there’s probably a few other techniques. About a year ago I switched to using 1/4 inch rubber bands. Cut new rubber bands into two pieces and tie them on to the blank with a square knot. Slip the guide feet under the rubber bands, position them on the blank and snip them off as you wrap the guides with the thread. The quarter inch-wide rubber band leaves enough of the foot exposed to run your whipping thread up the guide foot, far enough to gently remove the rubber band with a pair of sharp scissors. Keep a small paint brush handy to whisk away any “dust” residue left behind before finishing the guide wrap.