I love my riding jacket, but it's not what I want to see when I check the rear view mirrors. My CT mirror stemsare too short to give me a clear view without leaning to the side a bit. Have looked for longer ones, and looked ...until I decided to modify the ones I had. Mine have 10mm stems, so the sizes quoted here would need to beadjusted if you want to modify mirrors with 8mm stems.Materials: Aluminium tubing - 10mm outside diameter and 10mm inside diameter; 24hr epoxy.1) Cleave the mirror stems in twain. While the hacksaw is handy, cut two 50mm pieces of the smaller tubing, and two piecesof the larger tubing, the length of which needs to be worked out by trial as follows. The small tubing will be a spacer betweenthe halves of the stem. The longer tubing will be slide over the stem ends and the spacer, and should be as long as the straightsection of the whole stem when the three pieces are butted together.Scruff the stem ends and clean with solvent. Use quality epoxy for the next stage, not that stuff from the $1 shop.Slow-set epoxy gives plenty of time for the job, and is much stronger than 5min epoxy.Coat the inside of the longer tube, the stem ends, and the spacer piece with epoxy. Insert the spacer into the long tubeand push the stem ends in at each end. At this point there will be a hydraulic / pneumatic lock as there is nowherefor the trapped air and excess epoxy to go. Drill a 1mm hole in the middle of the large tube and be prepared to dealwith the epoxy that exudes when the stems and spacer are butted together.The stem ends can rotate in the tube, so while the epoxy sets, they need to be held at the correct relative angle.Both ends must lie in the same plane to reproduce the original positions of mirror and mounting. Below ishow I packed the mirror to do this.24 hours later, just a coat of quick-dry low gloss enamel to go. See the tiny pressure-relief holes?Looking good ....Even better .....A 50mm extension piece was decided upon as being the longest that would not look ungainly.Because the extension is both out and up when the mirrors are mounted, the total increase in width isnot 100mm, but closer to 60mm. Still enough to make my riding jacket feel ignored.