Stupid question time...Kind-of-a hijack but on this subject....I assume I need a D-tool to take the stock screws out when I want to replace with Brent's mixture screws - correct ? Also, please remind me which way is lean vs. rich ? Looking up at the carb leaner is clockwise ???

'06 Speedmaster, DBA Performance Pipes, re-jetted, needles, Snorkel / AI removed, shiny bits......