You said many things i will try to cover all.
1. "I could choose the maximum without spending a fortune every time I get a different HDD would be the top"
I.e. this Seagate ramp set that we talk was made 4 years ago. Our development procedures do not allow us to make more then 3 tools per year.
It just takes a lot of time, to make mesurments, projects, documentation, models etc etc. Even manufacturers of hdd's do not change that much disk mechanics.
So it looks like you have not been investing for a long time or you entered data recovery world recently.
Try to think that you run car repair shop. I want tomorrow to be able to open doors and fix all cars i can.
You will get customer with Fiat 127 and with new Gullieta? You must buy set of keys and special tools for old cars but also computers and special tools for new cars. It will cost a forutune. But if you started 30 years ago you just need to buy new OBD or something that will help you in your work. Just a small upgrade. Investing in tools....
2. You ask for a Kit of most common tools. It show me that you do not want to spend time digging dip ( dont get me wrong ). But it is just what producers of cheep tools want. They want that you buy a "SET" of tools and you think you will get something. On the other hand you get 99% of things you do not need, 90% of things that do not work and 0 % of documentation how you can use it. They know it costs more to send it back then to just accept you did a wrong choice.
I guarantee that 90% of this cheep tool clients feel what i just described. Btw it is a reason why we got into this . I got so mad with some stupid tool i bought from them 12 years ago...
It looks simple but you ask ramp for Seagate barracuda 3.5 . This is not even a close to name of hdd, and not even close that you need to choose right tool.
look at the name of tools we gave them.
Sea 3.5 Ramp P2. If you open hdd and look you will know what you need to pick with out looking at documentation or video or anythings else.
But if you look at manual
http://hddsurgery.com/pdfs/HDDS_Sea_3.5_Ramp_Set.pdfyou will see it is all made easy so you can find in 2 clicks what you need.
Can you buy a kit of most common resistors or capacitors. You can but when you need something you do not have you must buy it. Data recovery is special kind of service. It is expert thing. Not like Pc repair or like TV and VCR repair used to be. Tools that we make can be sold in less then 1000 companies. There is not Million of us.
So there is no mass production. If you make a series of 100 200 tools, it will take years to sell it. You can give it away for 1euro there is still only 1000 to 2000 clients.
Not more. It ruins make cheep sell millions strategy , it just does not make equation.
3. If we conclude that Data recovery is very advanced and proffesional service that is charged at much higher rates then any other service in branch. If we agree that prices in countries from Eu or America or some other good economies go sometimes 2-3 times on average wages in not so rich countries and if we have in mind that I still did not sow web site that says
www. XYZ Data recovery. zzz we use poor quality drives and charge you a lot of money for 2 click solutions
Why not try to use best tools there are, there is enough space to buy best tools, to buy good donors. You can not make money from every single job. Some things need investments. This is how I run my data recovery company.
My grandfather used to say , I am not rich enough to buy cheep things.
To conclude, all of us by cheep things first, some of us buy better ones at the end. Some give up in searching in the process.
Our company does not use any other tool then Ace labs. Maybe I am wrong. Time will tell, so far so good.
Inventing tools is expensive, if someone will make tools for big drives now 8 -16Tb that we need, I will be more and happy to spend money for them.