The phrase "achieved with only a" is correct and usable in written English.
It can be used when discussing the means or methods by which something has been accomplished, emphasizing the simplicity or exclusivity of the method.
Example: "The project was achieved with only a minimal budget, showcasing the team's resourcefulness."
Alternatives: "accomplished with just a" or "attained with merely a".
Therefore, tracking can be achieved with only a crude model of the controlled system.
Highly accurate solutions can be achieved with only a few grid points.
We showed that good acoustic quality can be achieved with only a minor reduction of cooling capacity.
Data collection with a single pixel MCT takes longer than using an array detector, but publishable quality data are still achieved with only a few minutes of averaging.
Furthermore, we conclude that a considerable improvement in the reliability of the network can be achieved with only a slight increase in the total cost.
Argentina have shown what can be achieved with only a few years of regular competition but they are an attractive economic proposition for a younger tournament like the Rugby Championship.
Note, for example, that not only does it include a focus ring on the lens -- a welcome luxury right there -- but the flip of a switch turns it into a manual zoom ring, opening up creative possibilities impossible to achieve with only a zooming switch.
A stable complex should be achieved with only Chl a, in a Chl b-less plant or by in vitro reconstitution, when weak ligands in LHCPs are replaced with stronger Lewis bases.
All this was achieved with only 20,000 troops and a relatively small international aid budget.
Mr. Chirac cited the new European currency, the euro, as an example of a success achieved with only 11 of the 15 European Union members taking part.
This satisfying performance is achieved with only of pilot insertion and a very low-complexity IDDD receiver.
