Your fixes would only help if the solenoid would not pull in at higher temps. The fixes will not improve a slow cranking starter.
Hot starters have less torque because the motor windings have higher resistance, limiting the current from the battery. Smallish cabling and poor connections make the issue worse.
A hot engine is harder to crank than a cooler one (at least at reasonable ambient temps). Along with 11:1 compression slower cranking is not surprising.
Improving your cable size and connections (ground and battery positive) may help, along with a battery with higher CCA rating.
Was it always like this or has it deteriorated? The latter may indicate starter wear.
George
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"...out to my ol'55, I pulled away slowly, feeling so holy, god knows i was feeling alive"....written by Tom Wait from the Eagles' Live From The Forum
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