Homebrewing Ham-Radio Equipment

Ok IŽam a typical Ham and has several project unfinished. I build this CQ-Parot and some Yagi antennas.

Since a few years I have also a 80m CW/SSB QRP TRX lying around because I can not get some Filteres for it.

Next is to build a CW Keyer maybe this from DL4YHF one or this one from OK2TEJ ?

See the Mod of an SSB-Electronic C-Netz Mobilphone PA for use on 70cm here.