n-infix or something similar

Jens shows in his article
'Winter's Law of Balto-Slavic Lengthening: An unnatural fact'
strong statistic support for the proposal that in Baltic the vowel
of the pretonic syllable is lengthened before original voiced
nonaspirated plosive.
Since I've got this idee fixe that PIE voiced nonaspirated plosives
were actually prenasalised, and therefore would like those Baltic
vowels to have gone through a stage with a nasal, ie. *-VD´-
-> *-VND´- -> *-V:D´- (the nasal removed after it became morphologized
as a present-tense marker), I would like to ask you: among the
examples you used, how many of the verbal stems have present tense
n-infix in Baltic?


Torsten