Total guesswork near the end that makes it virtually impossible. i gave up with it.

You have 4 lines pointing to the centre at the bottom. The top is a line and an unattached dot.

Thanks Teesea!

It's the last twenty dots that have multiple solutions. Thanks to Teesea, the hints made it solvable.

The coordinates are:
r1 c17; r2 c20; r3 c18,19
for the lines from the bottom the starting points are:
r25 c9; c24 c15; r22 c20; r19 c23.
Also, bottom right is filled in.

Thanks Teesa and Rinko.

Teesea and Rinko, where would we be without you! Thank you.

Thank you.^__^.

Thank you all.

Impossible without hints ridiculous.