>> I think you are the one who speaks some hillbilly Kajjaani dialect with doubling consonants

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My way of speaking Finnish comes partly ( not entirely ) from Kuusamo and it was certainly that part that led me astray.

I cover my face in shame ! I speak a mixture of standard Finnish and spoken language and there is certainly something from Kuusamo also in my speech:
"Tulisiko se?" I would say "Tulisikko se?". Kuusamo is not that far from Kajaani. ( I do not say "Kajjaani" ! ). I must have heard the correct pronunciation of words like "lukisiko", "tekisikö","olisiko","tulisiko","menisikö" hundreds of times but I have probably ignored it as Helsinki speak.
Olinpa minä tyhmä ! ( "olinpa" pronounced "olimpa" !

)
Man was I dumb !
How do you pronounce the word "sanko"? I say "sankko" and my guess is that you do too. Why on earth are "tanko" and "lanko" pronounced exactly as they are written but not "sanko" ?
There is more on the subject here if anybody is interested :
http://www.cs.tut.fi/~jkorpela/kielenopas/6.4.html
We Finns often tell foreigners that Finnish is pronounced as it is written. That is true most of the time but there are many exceptions to the rule.