Just found one on ebay for reasonable cost and grabbed itAny tips for a long and successful operating life? Mods or tricks? Carrying case?I got the usual stuff off mods.dk and the manual already
Here is the link for SG Club International - http://www.qsl.net/sgci/
They are pretty bullet-proof and simple radios, and there is not much that needs to be done with them. Go find yourself a decent hardside case with foam lining to keep it in. When being transported, I keep mine in a milsurp case for an AN/AVS-6(V)1 Aviator's Night Vision System. It is just big enough to store the radio along with it's accessories. I found it at a local army/navy store for $40. You'll probably be able to find something similar locally.
For rucking it around, get one of the Harris RF Communications Accessories Bags - http://www.armysurpluswarehouse.com/harris-rf-communications-accessories-bag.html - It fits the '2020 perfectly, and is deep enough to also carry a battery pack and accessories in the bottom of the main compartment and side pouch.
If you don't have the manual, you can get it at http://www.sgcworld.com/Publications/Manuals/2020man.pdf - While you're at it, visit http://www.sgcworld.com/PubInfoPage.html and download the HF Users Guide. Lots of good info in there.
The SGC auto-tuners are also a good item to have, and will tune pretty much anything. Another good tuner is the LDG. There was an SGC tuner made specifically for the '2020, I think it was the SG-211. I use a SG-237 and have been happy with it.
A CW "leg key" is also nice to have when operating in the field. I got mine on Ebay.
The best battery I have found at present is a simple 12V AGM "gel cell". They're about $30 at the local Ag store for a 7AH model. AGM stands for "absorbent glass mat". Much better than the older sealed lead acid (SLA) gel cells. You can charge one in a few hours with a "battery maintainer" https://www.walmart.ca/en/ip/everstart-2-amp-charger-maintainer/6000189395270 is the one I use. Gel Cells are not too particular about being charged, and are tolerant of minor charging mistakes. They are inexpensive compared to other battery units like the LiPo and Li-Ion boxes, and don't have any electronics in them that generate interference on HF, which I discovered was the case with my GoalZero Sherpa.