How easily could an independent Scotland set up its own currency?

The issues surrounding the creation of a new Scottish currency should not act as an obstacle for independence. The timing of implementation of the Scottish currency would be whenever worked best for Scotland – which would be dependent on the prevailing political and economic circumstances post-independence. 

If launching a new currency were to unfold similarly to the [three European] countries described above, an independent Scotland would likely be able to experience stability and greater financial control and flexibility that we do not currently enjoy as part of the UK.