Allow rcf calculation and inputs
Both rcf/rpm options
update usage
Spaces to prevent buggy perlcritic ProhibitDoubleSigils issue, see: 'https://github.com/Perl-Critic/Perl-Critic/issues/604'
Integer results
Remove extraneous newlines
Demand at least ONE input
Logic flow
Demand numeric inputs
Fix regex
Flags to allow common Sorvall Legend or benchtop minifuge
Update usage
Cleanup
Check all inputs