I broke the clutch casing bolt below/inside the casing. It’s at the one o’clock position and is a M6-1 bolt about 3” long. It’s a hex bolt with a concave top, blue in color. I tried the extractors and they don’t reach that far into the casing, except with the t-handle and can’t get a grip. I ordered reverse drill bits but they will arrive Tuesday.. (saw at AZ at lunch ). If the reverse drill bits don’t work (scares me to be drilling in there even with a depth gauge) I am to install a heli coil or time-cert (I’ve done time-certs on fords). The casing hole is 2” deep but the hole with the broken bolt is 1.5” deep. It seems the fix will install the new threads at the outside of the casing, hopefully to the engine. Is there a problem with this, the casing out there is thin, I would rather get the thread deeper and with more threads but it seems these things are very short. My idea is to get a bolt length that will go thru the casing (3/4”) plus another inch, so say 2” long )M6-1, 2” length). Does this sound like a good Idea? I have been sitting looking and praying each time I work on this problem…..Well any advice is appreciated/needed. Maybe I will just install the thread fix and forget about drilling out the broken bolt portion (1/2” lodged in casing). This is the same size as the oil bolt so maybe I can fix that.