Yep, I feel that pain. Did plugs and wires on my old i30t (loved that car. LSD, manual *****, strong stick alt and easy as hell to install audio gear in) and the back 3 plugs were pretty much the same as your t&c, by feel and mirrors. Snapped the head off a plug when installing too. Pi$$ed me off lol but got it out, replaced and running again. That car lasted to 245k miles and I wasn't exactly kind to it from day one when I got it at around 30 k on the clock. That engine was awesome! It was perfectly content at redline as it was at idle and it purred at idle. I had half shafts installed in it by a local shop known for being g good at Japanese imports and I told them it had the LSD in it, the fuc*kin vin even decoded with "(LSD)" in the model and the dipsh1ts put regular shafts in it. So while driving along about 70 miles after getting it back, I lost all power to the wheels, engine running perfectly and they had it towed back to their shop only to discover their parts mistake... Needless to say, I didn't pay for that tow and have never gone back to that shop since