Bump this thread.
Although I would have preferred to pay after delivery of work, I also understands @rehrar and the Cypherstack teams practical need for upfront payment.
I see the collaboration with Cypherstack and the integration into Stack Wallet as a gamble/taking some risk - it might work out well and lead to fruitful long term collaboration as well as benefit for all mimblewimble projects if it turns out well.
Regarding your answers to our questions:
Supporting tor, I think we should communicate well on this. Supporting tor is important for all privacy respecting projects out there.
Grin should:
- Start using Arti (rust implementation of tor),.
- Should update payment proofs to early payment proofs, perhaps with some work we can get it to work with the main branch until contracts are ready.
I expect a dedicated payment proof button (its just a button linked to an API call) in the transaction details for grin.
I also expect full support of slatepacks (copy text, QR code, save/send as file).
I can understand if other council members need more time to consider whether they want to support this Funding Request. I think we should not be in a hurry, probably a few months waiting would favor the costs to our funds in terms of BTC 
.
In short, for 20k I am willing to take the risk of supporting this Funding Request 
.