Killer lines and £20 notes 

Plaid conferences are usually pretty upbeat affairs but there's no doubt that members feel energised by the events in Scotland.

After all, the Welsh nationalists have never come together so soon after Scottish nationalists came so close to independence.

So on one level this is a great time for Plaid because not only did Scotland come close to the holy grail but it has triggered enormous debate about the future of the constitution of the UK.

Plaid feel this is their territory. One MP said Plaid own this ground and much of what I've seen in Llangollen this weekend is an attempt to regain the ownership of the constitution.

That's not easy when all the other parties are to a lesser or greater extent supportive of the roll out of further powers.

A key question for Plaid after Scotland is how it can differentiate itself from the other parties on the constitution.

No brainer

One observation from Leanne Wood's speech was that the loudest cheer came for her comments supporting English votes for English laws.

This is where Welsh MPs would not be able to vote on health and education matters in England, because English MPs cannot do the same in Wales.

In particular, the audience responded when she said the result would be that English MPs would no longer have a say on Welsh matters.

This appears to be a no brainer for Plaid, and the Tories for that matter, because they know what a headache it causes Labour.

But Plaid are comfortable with English votes for English laws because it deals with the elephant in the room when it comes to devolution, which is what to do with England.

There is a belief here that unless that's dealt with then there are always going to be problems rolling out further powers from Westminster.

Although Plaid say they'll only accept that system unless there's a better financial settlement from Westminster, in the same way that Labour will only accept further tax-raising powers unless there's a better financial settlement from Westminster.

Significant element

So nationalist or unionist it seems it all comes down to the same thing. The Plaid AM Llyr Gruffydd tells me he's kept a Scottish £20 note to always remind him that at the end of the day it always comes down to money.

Leanne Wood gave a wide-ranging speech that was packed with content but lacked what journalists the "killer top line."

What was the most significant element? Was it the hard-hitting call for parity with Scotland? Was it the reference to independence within years rather then decades or was it the first definitive support for English votes for English laws. You decide.

A final word on the issue of the moment: the state of the NHS in Wales.

Labour have pointed out that Leanne Wood was the only Welsh political leader to have been on the front page of the Daily Mail over the past week as it's launched into a week-long attack on health services in Wales.

Plaid won't feel comfortable being associated with the paper although to be fair they can't control the page layouts of the Daily Mail.

But it does strike a chord because there are elements of the coverage which they agree with even if the tone of the attacks are unpalatable for many in Plaid.