There is an issue with this

most puzzles now run for 7 days

This makes no sense so far as I can see.

a revisit is simple - usually no filters

A trimer with filters is quite the opposite. This is very slow for smaller machines.

Those with relatively powerful machines can handle the latter ok. The rest of us struggle.

Can we please have more sensible time scales for puzzles. Give everyone the chance to do the best they can?

Truth is FC - U cannot give everyone a top rate machine - so how about tailoring to suit the majority? How hard can it be?

To be clear - it's not as though half the world plays this for U - might seem sensible to hold on to the few players U have.