Significant overestimation of FTP

@ManofSteele hi. I’m newbie to xert may I request if you can pls check my TP I feel it’s over estimate. My last ftp test is 251w for 20 mins less 5%. My best 1hr effort is 241w 2yrs ago. So right now I set my ftp to 238w just to be safe. For your guidance pls. I’m still learning this beautiful app. Thank you