WT19 R4 combo

Finally pulling out truly hard material this round. I haven't made any fl combo over 10 seconds for quite a while.

The difficulty is far higher than R1-R3
- hardest material shown in those videos is R2's ending linkage and R3 hardest linkage (R3 0:03 - 0:06)
- R4 can be considered as 4 sections as outlined below, 3 of which are of comparable difficulty to those sections

0:01 - 0:04
indexspin ~ index mid mirrored powerpass reverse ~ ring pop ~ arm bounce
- extra 0.5 spin on index

mid ring mirrored powerpass reverse - triangle pass 234 - powerpass 23-34
- a lot harder due to arm bounce entry
- maintaining control and speed for the triangle pass is probably hardest part of this link

0:05 - 0:08
hai tua ~ palm down fingerless pinkyaround reverse (fingers closed) - palm down fingerless middlearound reverse (fingers open) ~ mirrored fingerless middlearound reverse ~ ring spiderspin
- highlight sequence of this combo: proper integration of pd fl around rev into fl combo without any catches in between
- different mechanics in doing the pd fl around rev with fingers closed and fingers open
- mirr fl ma rev ~ ring ss requires hitting pen from other side (see slomo, it is far harder to do this than ordinary fl ma ~ ring ss)

0:08 - 0:10
index mid mirrored powerpass reverse - inverse mirrored powerpass reverse - fingerless indexaround - spiderspin
- the visual effect of the inv mirr pp rev contrasts with previous material
- the easiest sequence of this combo

0:10 - 0:13
fist bust fishing - fist bust x 2
- doing fishing like this requires changing angle of pen's rotation during difficult tricks (see slomo)
- fist bust typically rotates fairly horizontally, whereas the fishing part has pen spinning diagonally
- around 1/4 to 1/5 chance of doing fist bust x 2 successfully in this sequence (compared with just doing x 1)
- made more difficult by being ending

As far as I know, this is first time this material has been used in complete fl combo - only idea that has been used in previous tournaments was the wrist bounce. This is the first combo in this WT where fairly high proportional of my difficulty capacity has been shown (as opposed to R1 fourth root, R2 third root and R3 square root).

Aside from the difficulty, the variety of mechanics in the fl linking is quite large. To use this kind of material effectively throughout a combo, every sequence must feel like a highlight, while also displaying different visual effect.

Unfortunately there are several areas of relative filler (the powerpass 23-34 in first sequence, and the fl ia ss before the ending). Otherwise, the material shown has sufficiently high density for my current ability.

Sorry for hair on frame, hopefully I can pass despite that.
R5 is another step above this combo, so I am praying for victory.