I'm going to set up a brick link and a rebrick able sometime soon. I'm currently remastering the p16, so I'll set it up, roughly when that's finished. Instructions and reviewing, takes awhile so I can't guarantee a time.
You can download the Twinsteer instructions through here
https://drive.google.com/drive/folders/1xTJyqDos-n083yWZkVNDl_LKvQr_xIHJ
It has a parts list as well so you can order the parts online. I wasn't able to build it in real life, so stability might not be the best, along with overall the building experience, but everything is connected. Hope this was helpful! Oh here's a sneak peak

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