tankgirlfuzzy wrote:I hate to sound negative, and I certainly don't have anywhere near the talent of Mr. Plasmo, but I've watched that video before and was appalled at that soldering technique. Now, I'm no soldering guru--in fact, I'm decent at best and average most of the time, but there is no way those bonds will hold under any kind of real stress. It's fine to do this for static 1/35 models where the parts will never be touched after completion, but tacking a little solder and then "painting" it on the joint with an iron wil not lead to a strong joint that will take any bit of stress or handling. For a strong enough joint that can withstand parts being handled or bumped or tugged at, like on our RC tanks or in say battery connectors, etc. you must heat both metal parts to be joined and melt the solder using the heat at the joint, not the soldering iron. The use of flux definitely helps that process. And to keep things neat I use solid wire without a rosin core, which makes it easier to control the "flow" of solder. Also, I stick with lead based solder because it's just easier to work with and is strong enough for models and electronics. Lead free solder with silver needs much higher heat and is harder to work with, but some have success using torches, which I've never tried.
I'm about to post a thread where I've had to deal with just this issue on soldering brass parts that need to stay on when bumped or tugged, so I've had to further refine my technique. Soldering is one of those things I hate doing, but have learned to do by necessity in RC flying, but it's taken a long time to gain any skill at it. Some are lucky and take to it easily, but I think for most it's a difficult task that can take years to gain competence.
I still use lead-based solder when I can get it, as it is much easier to work with. However, anything vaguely toxic these days, gets the Health and Safety Fuhrers' knickers in a twist, and lead is on their hit list.
However, I only solder electronic parts, PCBs and things like guitar pickups. The PE world is one inhabited by hopelessly addicted modellers, who seem drawn to creating almost microscopic detail

Indeed, it's probably a place where graduate modeller's go... a sort of modelling monastery.

I'm tempted to visit it; but I might not stay.
I saw some static models of tanks, for example, and other armoured vehicles (in several scales; but all less than 1:16) in the Swiss Military Museum (
https://www.festungsmuseum.ch/englisch/) The detail was simply breathtaking. However, the models also smacked of an essential fragility. It was difficult to envisage them kitted out for tank-on-tank action.
From what I've learned, it seems that when parts are scaled down they seem to lose strength (that suggestion could prompt several other threads

).
In any event, I accept that really refined model components are likely to fail (break, fall off) under 'battle' or rough trial conditions. PE parts ought to be tougher than the more delicate 3D printed plastic bits; but could still fall prey to torsion, stress and mishap. Yes, some plastics are stronger than others, but metal ought to be more durable.
"Get your facts first, and then you can distort them as much as you please"- Mark Twain.