Worked on the 3/4" x 0.035" I-Strut brace tubes today. Used the cut-off wheel and angle grinder to create the "fish-mouths" of each brace tube to neatly fit onto the streamlined I-Strut tube. Took a while to do all eight of them! They all fit really well and ready for tack welding (next week!). I will then remove each I-Strut for final welding.