trouble with KT 88 profiles

    Was wondering if any other users here have trouble profiling amps with kt88 valves.
    I notice when i try profile my Marshall Pig major or Marshall PA major - i cant seem to capture that output valve distortion very characteristic of kt 88s.
    Yet, when i capture my vintage vampower amps at loud volumes, the character and crunch of the el34s comes through no probs.
    Does anyone here have much experience with profiling cranked kt 88 type amps like hiwatts and majors?

    I've profiled a Marshall Kerry King Signature, which basically is a JCM 800 with KT88 driven power amp. I did not have any issues profiling that amp at pretty high volume. You'll find the profiles on Rig Exchange.