Hey Arthur, you are very welcome to try iCKB in CellScript 
To make that easier, I tightened the iCKB artifacts around the relevant DAO, header, witness, and deployment details:
ickb/contractsPR #19: merged. Adds the local executable review plus the expandedscripts/testssuites and replay-heavy cases. See also iCKB Contracts Revisited: Old Code, New Auditickb/whitepaperPR #24: merged. Consolidates the protocol and deployment notes.nervosnetwork/rfcsPR #453: open. Notes the current DAO same-serialized-lock-size rule that nodes enforce for phase-1 withdrawals.
So if you still want to use iCKB as a maturity benchmark, the code and docs should be a much cleaner starting point now.
Happy to help once you get to concrete fixtures,
Phroi