Vfe 90 kts (103 mph) for any extension. Look at upgrading the flap connecting rods to the newer hex rod, just, because.
In KIAS: 90 downwind, 80 base, 70 final is a good start, milk the final speed down closer to 60 as you get more comfortable.
What do you mean by 'grip'? That handle is just tough, this fix
helped ours quite a bit.