This^^^@viro - That tank slapper (gravel run) was due to brake technique. You were almost at 100% brake and already turning into the corner. Can't drive like that with a mid engine car. It also shows up in the second wet video at about 30seconds. You are braking in mid corner. This will remove all weight of the back end and you will loose the back end (oversteer). Most of your braking must be done before you turn in, and trail off on the brake. You can see my brake trace coming in to a long high-ish speed sweeper. Quick on, slow release off. I'm not perfect, but work on that trail braking around the first 1/3 of the corner.
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Couple of items of advice in the wet.... First stay off the paint. Stuff is slick as ice in the rain and is is usually a quick guarantee for a spin. Second, chuck that all weather mode... Learn to modulate the throttle and gear selection to maximize traction while in your normal operating mode. I have lots of friends that just leave their high powered mustangs in 4th gear and zip around that way. Finally, if you really want to get better at correcting the slides slap her in race mode and drive the "dry line". That track is remarkably sticky in the wet. My local track is like a sheet of ice, but fudge is it fun to slide around.
Now I type all of this... I'm not a professional driver, and probably not that good of one either... I'm just trying to help out, and still learning myself, so take it with a grain of salt. A week or two ago, I had a virtual coaching session with a professional driver. He overlayed my VBOX data with his, and I have to say it was a complete eye opener on just how smooth a true professional is. We were working on throttle application coming out of the corners. I'm trying to get the video, and i'll take a quick screen grab on just how different his skills are versus mine... Nite and day...
Nice, smooth, consistent lines and a lovely circuit.