Converging k-points in Transiesta/TBTrans

I believe that there are some gaps in my understanding of how to converge k-points in Transiesta/TBTrans (version 4.0). Below I've compiled what I've read/know, asking questions where unsure.

Converging k-points in Transiesta:

1. For the electrodes, I've read that one should use a high number of k-points in the transport direction (~100), and then converge the transverse direction k-points. Is this so? I would've thought that because the electrode calculation is a Siesta calculation, one would have to converge k-points in the transport direction as well.

2. After the k-points of the electrode are converged, the transverse-direction k-points of the device should be the same as for those of the converged electrode. Is this true? And, because Transiesta truncates the transport k-points to 1, do we need to worry about converging k-points for the device region at all? Or do we converge for the device region first, and then use the transverse-direction k-points in defining those of the electrode?

Converging k-points in TBTrans:

3. Here I've read that one must converge transverse-direction k-points by looking at the averaged transmission. This is done by overlaying transmissions calculated using different k-point samplings, and finding the density at which the superimposed curves fall on top of one another, yes?

And, finally, regarding the last column of the k-points block: is it a good rule of thumb to set each entry (offset) to 0.5? Are there cases where setting each entry to 0, or some other number, is preferable?

Thank-you for your help.