There are 4 knots I use all the time, the Alpine Butterfly, a Bowline, a Stopper Knot and a Half Hitch. Learn these and you will never need another climbing contraption ever again. Callum.
More videos:
▶    • Antenna Modelling   Antenna Modelling
▶    • Tips and Tricks   Tips and Tricks
▶    • Antennas   Antennas
▶    • Live Streams   Live Streams
▶    • Commander World   My Stuff
▶    • Foundation Training   Ham Radio Training