The lever is stiff or squeaks

The lever is stiff, squeaks, or weeps

Not in Rocket's manual. Retailers for E61 groups in general: detergent backflushing strips the cam grease (Clive Coffee), and water weeping where the lever enters the group means the two cam seals are worn (Chris' Coffee). A few normal shots after a detergent clean often free it.

Rocket Giotto Fast V: every job