First of all, hello to everyone and thanks for an excellent site.

Currently in the first stages of extracting 100g MH but I doubled the amount of water and vinegar when I should have stuck to the original steps. Should everything else be doubled from this point onwards?

Already followed this tek to a tee for a 50g extraction and pulled approx 1.2g

Welcome
For 100g everything stays the same...no doubling of anything.
Since you already have double water...just carry on as normal and add a little more salt and lye to make up for the dilution.

Good luck.

Quick reaction appreciated. Proceeded as advised.

Should I expect the double water&vinegar to impact the outcome? What may have happened if I proceeded with double everything?

All will be well.
If you double everything it would be ok but since the solution would be large compared to the amount of bark and quite dilute, the freebase molecules would not be as concentrated and would require much more/longer mixing of the nps to pick them all up.
As for nps...read This post.

Should I repeat the nps separation an extra one or two times to be safe?

Noticing the basifying mix has a bit of a foamy head. Seems more than I recall from the first extraction.

Sure, it can only help.
The foam is likely the salt doing its thing...it will likely dissipate in time.

Still quite foamy. Have a feeling this might be linked to using double the amount of vinegar.

Will leave to basify overnight then add nps tomorrow.

This is an old thread but reading through the salt tek, and the more advanced max ion tek, it is always recommended to ( Do not just double the ratios per ratio of bark), however reading through the FAQ, it says to just scale up the quantities accordingly.

I have read the explanation on why there is no need to scale up the non polar solvent, however what about the rest of the materials?

If it helps, here are the things that matter for Cybs, IMHO. I'm no professional chemist, just school, ages ago, so I'd welcome any corrections from fully qualified readers

Water volume ... you need enough so that it's not viscous and free mixing can occur. It also dissolves the DMT salt from the bark, I doubt there's any risk of the water becoming saturated with DMT salt so there isn't really a minimum from that point of view. Too little water can make your base soup hang on to a lot of your NPS.

Vinegar : Helps break down plant cells to release the inner goodness, you need enough to take the ph of the water down to 3 or under. So scale with the amount of water you use in the first part.

Salt: Does "ionic stuff" to help the DMT freebase get into the NPS, also helps prevent emulsions. Scale this with the total amount of water you use.

Lye: This needs to take the amount of vinegar water you have to a Ph of at least 12 so that the DMT salt is converted to freebase. To do this it will first need to neutralise the vinegar, then more will rapidly increase the ph. Most teks start with a decent excess to ensure that it'll work, even without being able to measure the ph. Excess also allegedly helps stop emulsions.
Scale with total amount of water used, add more if you really overdid the vinegar.

NPS: This picks up the freebase DMT which precipitated out into suspension when the lye was added, don't use too much or you'll not be able to saturate it enough to freeze precipitate out your DMT, use too little and you just have to do more pulls to get it all out.

Hope this helps!

I appreciate the carefully written response, it helped alot, and it makes sense as a tek can't replace the "feel" for what is going on and adjusting the materials based on that.

So if I got it right it all boils down to the quantity of water used, as water will determine the vinegar and the following will determine the lye, so it is essential to keep these in somwhat of a ratio. And regarding the water, enough to obtain a "watery" environment is enough.

I think I got this, thank you!