aluminum can be tempered like other metals, i guess those ones are NOT lol. I usually stick to steel turnbuckles.. the weight savings from turnbuckles are so fractionally small im just not a consistant enough driver to ever notice.. same with screws.. stainless screws that wont strip the hexes out.
what would be interesting to see is a coated steel turnbuckle that starts from hex stock and drilled out hollow. weight savings and tempered strength
oh, pleased to report that the S1 handled carpet FRICKEN AWESOME. i left the setup the same from the last two weeks of outdoor and just put it down right after setup. track had been in storage all spring/summer so there was no traction really built up.
Car was very planted and composed. ill have to test it out with a few different settings before our big wcics race but i was easily able to match laptimes of the 13.5 1/12th cars which is pretty awesome for 17.5 rubber tire.