After a year of using an Icom 7300 with my Macs, I recently took delivery of an Elecraft K3S which I expect to become my main rig. After a few days of getting set up, things are going reasonably well but I have a few issues I'm still ironing out. It would be great to make contact with other K3/K3S owners here who are also Mac users in order to be able to get some feedback. Here are my issues right now: 1) WSJT-X is functioning well with the K3S attached to a MacBook Pro by a single USB cable for both CAT control and audio transfer via the USB Codec. It works pretty much as my 7300 did, with WSJT-X controlling the radio; when I click in WSJT-X to log a QSO, it goes via JTBridge to MacLoggerDX and is uploaded instantly to LoTW, ClubLog, eQSL and QRZ.com. One issue I've noticed is with received signal level. On the 7300, I could dial the RF Gain knob up and down to set the vertical signal level bar at the lower left of the WSJT-X window to an appropriate level in the green zone based on band conditions, strength of the DX signal I'm chasing, etc. With the K3S, apparently it's normal to leave the RF Gain knob fully clockwise all the time. Even there, the signal level meter in WSJT-X never gets higher than about 60 dB. That's okay for many sessions, but sometimes if a DX signal is weak and there isn't too much else on the band, I might want to crank it up to, say, 80 dB on the edge of the green-red zones. On the K3S, I've experimented with going into Config and increasing the setting for Line Out from its default of 10 as high as its upper limit of 100. However, that doesn't generally result in a dramatic increase in the level on the bar in WSJT-X. To the best of my knowledge there are no settings to adjust in the Mac's audio system or within WSJT-X. So, are there any other settings on the K3S that can cause a bigger change in the audio level sent to WSJT-X? What are typical values to use for Line Out? 2) I don't have as much experience with FLdigi as with WSJT-X, but it seems as though in FLdigi the received audio level is an even bigger issue. Maybe it's due to band conditions, but when I've looked on 14.070 or 7.070 at seemingly appropriate times, I'm just seeing nothing. Can any FLdigi users recommend settings to adjust to bring up the audio in? 3) I'm still getting a handle on how the K3S deals with power level out. On the 7300, there was a horizontal meter bar that showed what seemed to be actual power out at any time, taking into account other settings, SWR, etc. On the K3S, there's a PWR knob to turn to select a numeric value for desired watts out, and I'm aware that with Elecraft radios the goal is to set the ALC on transmit to show 4 1/2 bars. But if I have the K3S's PRW knob set to, say, 60w, does that mean I can actually expect 60w to be sent to the antenna? How does the vertical power slider in WSJT-X, or the Tx level attenuator (dB) setting in FLdigi, affect that? Short of connecting a wattmeter between the rig and antenna, is there a way to get a good approximation of the actual power out to the antenna? Thanks for any possible feedback on these questions.