The first creates hydrophilic silica Aerogel, and has worked several times.
The second is an extension of the first, with an additional tool that introduces TMCS, thus (hopefully) creating hydrophobic silica Aerogel.
The third is a completely different method, using Hydrogels, which is waiting on materials and tools to attempt.
Testing the second method has begun, with the Alcogels in the autoclave & the Clavorator assembled, connected to CO2, & cooling.
Pretty Kewl, eh?