I feel fat.
I’m 47 yo too, 62kg on the scales yesterday morning. Garmin is placing me at VO2Max of 62 (Intervals.icu 56 at the moment), another formulae places me at 61 lol. My Max HR is 197bpm and my LHRT is 181bpm (at around 228w, bottom of Z4) and theoretical FTP is 253w in the TT position. So if my estimated 56-62 VO2 Max can get me 228w (at the bottom of Z4) in the TT position I suspect your higher (and actually measured VO2max) will get you more in the future @EP_111