Fabulous workmanship Jonathan, well done, it makes my Heath Robinson DIY efforts look very amateur, however I have 262 DXCC countries confirmed on 160m, so its amazing what can be be done with wire, coil, capacitors and higher power once you have achieved your first top band QSO across the pond to the USA. Working into Russia was the first hurdle though, and soon after getting my licence, I realised that in those days without FT8 etc CW was the way to do it. So after working Vlad UA3PFN near Moscow, late one night on the key in June 1982 I was bitten by the Top Band bug! AA1K in Jan 1983 was my first USA - G (Lancashire) DX QSO I think!
The tips found in the late ON4UN Top Band books on LF antennas are essential for success I have found, John never mentioned what power he used, but I do remember the strength of his signals and chatting to him after listening to his presentation at an RSGB HF Convention in the 1980s.
The first rule for success as a 160m DXer is that you need to be there, so a night owl mentally is essential. The ability to get out of bed in the middle of the night for an hour here and an hour there, and to be there for the grey line to wherever you want to work, is the key. Then you need to get the best antenna you can that fits your QTH.
I’ve always been a fan of the 1/4 or 3/8 wave inverted L, it’s practical and is made easily resonant to 50 ohm coax. Either the quarter wave or three eights wave length version, with as high a vertical section as you can possibly make from the 130 or 180 feet length has worked best for me.
I have relied mostly on trees around where I have lived for elevation, or a house roof to either support the vertical section of the inverted L, or the end of it. Running the vertical section up the side of a mast or tower around 1 metre away from it (but not shunt feeding) has worked well for me. To make either antenna resonant over a good ground I use one of two simple methods, without resorting to inductance or a tuner unit as such.
When I was fortunate enough to be able use a 3/8ths wave inverted L, I rigged an 80 feet vertical wire up the side of a Versatower with a 100 feet top, to a sycamore tree with the end at 50 feet AGL I used a 1000pf Jennings variable capacitor in series at the feed point to resonate it on 1833 kHz. This antenna was loaded against around 5000 feet of random length ground radials. At this QTH from 2000 - 2016 I had the most success on 160m. I was able to rig a single terminated beverage 450 feet long there pointing directly at the Caribbean. It was very effective - but only in that direction. I didn’t get as far as making it bi-directional.
At my last QTH from 2017 - 2026 and until I went QRT from there in April, I used a 1/4 wave inverted L, wire fed from the base of a beech tree up to the 40 feet level, where I fixed a 30 feet heavy duty fishing pole with HD Tywraps and Velcro tapes, giving me a 70 feet vertical section. The wire top of 60 feet came down to the gable end of my house and finished at around 30 feet AGL. That antenna was fed against around 2000 feet of buried radials, which included a peripheral wire bordering the fences around my garden of around 350 feet in length. I have found that the impedance of a quarter wave antenna over a decent ground is between 20 and 25 ohms, so to overcome that and improve the SWR from around 1.7:1 and enable the use of the legal limit, I used a 2 KW rated 1:2 UNUN to bring the match down to 1 to 1 SWR on around 1835 kHz. That way no tuner unit is required.
As I said, it’s all very much a “Heath Robinson” build mentality at G4OBK - but it’s worked for me DXing on 160m over the last 40 odd years.
73 Phil G4OBK
or trying to find 80m of room 
otherwise it’s game on.
) but he was approachable and could understand why I wanted to operate on Bioda Mor and Hirta - we will hopefully see next weekend.