Your rev limiter is there for a reason, leave it alone unless you engine has been worked to utilize more engine revolution. For that you need better internals and bearings
been using it for more than a year now... Trust me when i say.. u don't need it really... You will get bored of it after a few days.. It won't fark your engine, it usually depends on how often and how hard you use it.. If u set Gain to F and at low rpm's.. then you are asking for trouble..
im experienced a lag or boost up slow with td04hl rvr turbo after installed it today...like using td05h 16g...nearly 5000rpm full boost...b4 that im using td04l and have good response wit it....the td04hl looked good...