"I am familiar with the methods, but..."

Hello everybody, I am writing a cover letter and I am not sure about proper (or "best") way to write one part. The job is in molecular biology. I studied undergraduate molecular biology, but later I used only cell biology.
Thus: I am familiar with molecular biology methods on theoretical level, but I've used the methods mostly only 1-3x and not independently (trying new things and troubleshooting).
The methods I used for work are more demanding (when it comes to manual skills) than what this lab is doing.

So I would like to write something like this:
In my work, I used cell biology methods (reasonable examples here), but I have an undergraduate degree in molecular biology, thus I am familiar with the methodology (on this level?). Considering that every lab is different, I am confident that my lack of troubleshooting experience would not be a great obstacle. And as you can see from (list 1-2 complicated methods) fine technical skills are not a problem.


Approximately. 
(how I am qualified for the job would go before, future career plans after this)
How would you treat these "but / although / etc" sentences? I mean I've seen a lot of cover letters, and I realize that stuff like that does not really belong in a cover letter, but I cannot skip it altogether (I want to write what I did, because I think it will help even though it is not required, but just putting unrelated skills in your cover letter... that looks like you are copy-pasting the same cover letter everywhere, right?). 

Oh and the lab is in continental Europe, so it should be less boasting and shameless self promotion than in the US (if you say that someone is "excellent" then it sounds really weird, unless they just got a Nobel prize). And I think it will be read by the professor, not by a professional recruiter. 

Many thanks for any input!