BTC Synthetic Pow Contract expiration settings for the early days

[0xSSoul]

The most important use case of Synthetic PoW Mining Contract is hedging the mining risk. For the minerss, the further contract is better. Besides, rolling contracts leaves a hugh risk exposure for the miners. In the other hand, in the early days of the contract, too many contracts harm the liquidity.

I suppose the expiration settings of contact below:

T + 14
T + 28
T + 42
T + 56
T + 70
T + 84

Some rules to follow:

Set the expiration time at the middle of the BTC difficulty window (about 14 days), which means set the expiration time 7 days after an expected difficulty adjustment time. Due to the inability to accurately predict the difficulty adjustment time, 7-days is a very safe transition period，which makes the contract expires after a difficulty adjustment.
The disadvantage of this is that the index will not change 7 days before the contract expires and the contract value is no longer changed neither.

Alternative: less contracts

T + 28
T + 56
T + 84